(2003). GRE general test, [electronic resource] Powerprep software.
Cita Chicago (17th ed.)GRE General Test, [electronic Resource] Powerprep Software. 2003.
Cita MLA (9th ed.)GRE General Test, [electronic Resource] Powerprep Software. 2003.
Atenció: Aquestes cites poden no estar 100% correctes.