ArgoPrep. (2019). 2019-2020 gre argoprep. New York.
Cita Chicago (17th ed.)ArgoPrep. 2019-2020 Gre Argoprep. ArgoPrep Inc: New York, 2019.
Cita MLA (9th ed.)ArgoPrep. 2019-2020 Gre Argoprep. New York, 2019.
Atenció: Aquestes cites poden no estar 100% correctes.