Cita APA

BOBBY, U., & PYRDUM, C. (2019). Barron's GMAT (2.). Kaplan.

Citación estilo Chicago

BOBBY, Umar, y Carl PYRDUM. Barron's GMAT. 2. Newyork: Kaplan, 2019.

Cita MLA

BOBBY, Umar, y Carl PYRDUM. Barron's GMAT. 2. Kaplan, 2019.