APA aipamena

Kaplan test prep and admissions: GRE course book. s.n.].

Chicago Style aipamena

Kaplan Test Prep and Admissions: GRE Course Book. [S.l: s.n.].

MLA aipamena

Kaplan Test Prep and Admissions: GRE Course Book. s.n.].

Kontuz: berrikusi erreferentzia hauek erabili aurretik.