Educational Testing Service. (2015). The Official Guide to the GRE revised General Test (2nd ed.). McGraw Hill Education (India) Pvt. Ltd.
Чикаго-гийн эшлэл (17 дахь хэвлэлт)Educational Testing Service. The Official Guide to the GRE Revised General Test. 2nd ed. New Delhi: McGraw Hill Education (India) Pvt. Ltd, 2015.
MLA -ийн эшлэл (9 дэх хэвлэлт)Educational Testing Service. The Official Guide to the GRE Revised General Test. 2nd ed. McGraw Hill Education (India) Pvt. Ltd, 2015.
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