1. Writers sometimes use the surname of the first author followed by et al. at the first mention of a work that has three, four, or five authors. Only when a work has six or more authors should the first in-text citation consist of the first author followed by et al.
A Work by Three or More Authors List only the first author’s name followed by “et al.” in every citation, even the first, unless doing so would create ambiguity between different sources. In et al., et should not be followed by a period. Only “al” should be followed by a period.
No publication date When should I use “ et al.” in APA in-text citations? The abbreviation “ et al.” (meaning “and others”) is used to shorten in- text citations with three or more authors.
1 Answer. The grammatically correct way is “Einstein et al.’s paper”, because to indicate possession by a noun phrase in English, the ‘s should be applied to the end of the phrase. I’d recommend using a different wording like “the paper of Einstein et al.” or “Einstein, Podolsky and Rosen’s paper”.
Punctuation. The “ al ” in “ et al.” is always followed by a period. This is because the term is an abbreviation of the Latin phrase “ et alia”—the period indicates that it is an abbreviation: et al.
refers to a list of things, et al. refers to a list of people. Etc. is common in formal and informal writing. Etc. is short for “ et cetera,” which is a Latin phrase that means “and the rest.” Use etc.
MLA uses “ et al.” for works with three or more authors, while Chicago calls for using it with four or more authors. APA format requires that you cite all of the authors at the first mention if there are three, four, or five, and use “ et al.” afterward.
More Than Seven Authors List by last names and initials; commas separate author names. After the sixth author’s name, use an ellipsis in place of the author names. Then provide the final author name. There should be no more than seven names.
APA 6th vs. 7th edition Et al.: “ et al.” is used in the first in-text citation for works with three or more authors. Up to 20 authors cited: In the reference list, give the surnames and initials for up to 20 authors. Website names: Website names are now included as well as the webpage title.
Use the word “and” between the authors’ names within the text and use the ampersand in parentheses. In subsequent citations, only use the first author’s last name followed by ” et al.” in the signal phrase or in parentheses. In et al., et should not be followed by a period.
Dear and hello are warm, positive words. Et al., the abbreviation of et alii, is about as friendly as a flu shot. They don’t fit well together. The use of et al. is not standard in greetings, so people will stumble over it, wondering whether they missed an important new rule somewhere.
When there are three to five authors, use all of their last names in the first citation, and afterwards use the first author’s name with et al. Use commas to separate the names, use an ampersand (&) instead of “and,” and place a comma before the date.
” et al.” is generally used for papers with more than two authors. (Note that ” et al.” makes the subject plural if the authors are the subject of the sentence rather than the paper, so it is “Smith et al.  show” not “shows”.
In a subsequent reference, you would cite the name of the first author listed followed by et al. Johnson et al (2010) confirmed the number of participants. If a work has six or more authors, only cite the first author’s last name followed by et al for all in-text citations.