ETS. (2019). Official GRE Verbal Reasoning Practice Questions Vol.-1 (10TH.). Mc Grow Hill Education (India).
Chicago-referens (17:e uppl.)ETS. Official GRE Verbal Reasoning Practice Questions Vol.-1. 10TH. Chennai: Mc Grow Hill Education (India), 2019.
MLA-referens (9:e uppl.)ETS. Official GRE Verbal Reasoning Practice Questions Vol.-1. 10TH. Mc Grow Hill Education (India), 2019.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.