APA (6th ed.):
ProCon.org. (2011, April 4). Books citing ProCon.org. Retrieved from https://www.procon.org/books-citing-procon-org/
[Editor's Note: The APA citation style requires double spacing within entries.]
Chicago (17th ed.):
ProCon.org, "Books citing ProCon.org," ProCon.org. last modified April 4, 2011. https://www.procon.org/books-citing-procon-org/.
MLA (8th ed.):
ProCon.org, "Books citing ProCon.org." ProCon.org. 4 Apr. 2011, www.procon.org/books-citing-procon-org/
[Editor’s Note: The MLA citation style requires double spacing within entries.]
Turabian (8th ed.):
ProCon.org. "Books citing ProCon.org." ProCon.org. Last modified on April 4, 2011. Accessed January 24, 2021. https://www.procon.org/books-citing-procon-org/