Παραπομπή APA

Green, S. W., & Wolf, I. K. (2008). Barron's GRE 2008 (17th ed.). Galgotia Publications.

Παραπομπή Chicago Style

Green, Sharon Weiner, και Ira K. Wolf. Barron's GRE 2008. 17th ed. New Delhi: Galgotia Publications, 2008.

Παραπομπή MLA

Green, Sharon Weiner, και Ira K. Wolf. Barron's GRE 2008. 17th ed. Galgotia Publications, 2008.