Manhattan Prep (Firm). (2015). 5 lb. book of GRE® practice problems: GRE® strategy guide supplement (Second Edition.). MG Prep, Inc..
Lua i Stíl Chicago (17ú heag.)Manhattan Prep (Firm). 5 Lb. Book of GRE® Practice Problems: GRE® Strategy Guide Supplement. Second Edition. New York, NY: MG Prep, Inc., 2015.
Lua MLA (8ú heag.)Manhattan Prep (Firm). 5 Lb. Book of GRE® Practice Problems: GRE® Strategy Guide Supplement. Second Edition. MG Prep, Inc., 2015.
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