Pierce, D. (2011). Cracking the new GRE, with DVD (2012 ed.). Random House.
Chicago Style aipamenaPierce, Douglas. Cracking the New GRE, with DVD. 2012 ed. New York: Random House, 2011.
MLA aipamenaPierce, Douglas. Cracking the New GRE, with DVD. 2012 ed. Random House, 2011.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.