Answer:
The correct answer is ENTRY C.
Explanation:
"et"= and (since it is a complete word you don't need a full stop)
"al." = others (you must include the full stop because this is an abbreviation)
"et al." is a latin abbreviation that means "and others".
We use it when acknowlegding a text that has more than two authors. So, if there is less than two authors don't use it! Entry C has the correct punctuation, although options may vary depending on the referencing format that you are required to use as a guideline.
Entry A is incorrect. Because in the world of academic language we try to avoid "and others" when referencing.
Entry B is incorrect. Because "et" doesn't take a full stop since it is a complete word.
Entry D is incorrect. Because after the name of the author you should include a comma, unless you use "et al." for an in-text citation.
