Entry B: Jones, Gina. Letter to the author. 15 Oct. 2011. TS. is the completely correct one.
Correct works cited entries begin with the author's last name. Entry A begins with the author's first name and that is why is incorrect. On the other hand, Entry B begins with the last name of the author (Jones) as well as entry C and entry D. However, entry C is incorrect because the word "author" should not begin with a capital letter. Furthermore, entry D is also incorrect because there should be a period after "TS". In that way, entry B is the correct one because there is no initial capital letter in "author" and it also presents the right punctuation.