Cita APA

Jaffe, E. D., & Hilbert, S. (2014). Barron's GRE (20th ed.). Barron's.

Citación estilo Chicago

Jaffe, Eugene D., and Stephen Hilbert. Barron's GRE. 20th ed. Hauppauge: Barron's, 2014.

Cita MLA

Jaffe, Eugene D., and Stephen Hilbert. Barron's GRE. 20th ed. Barron's, 2014.