Green,S G. (2006). Barron's How to prepare For GRE,16th ed (16th ed.). Galgotia.
Lua i Stíl Chicago (17ú heag.)Green,S G. Barron's How to Prepare For GRE,16th Ed. 16th ed. New Delhi: Galgotia, 2006.
Lua MLA (9ú heag.)Green,S G. Barron's How to Prepare For GRE,16th Ed. 16th ed. Galgotia, 2006.
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