APA aipamena

Pierce, D. (2014). Cracking the GRE. Random House.

Chicago Style aipamena

Pierce, Doug. Cracking the GRE. New York: Random House, 2014.

MLA aipamena

Pierce, Doug. Cracking the GRE. Random House, 2014.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.