ETS. (2019). Official GRE Verbal Reasoning Practice Questions Vol.-1 (10TH.). Mc Grow Hill Education (India).
Cita Chicago (17th ed.)ETS. Official GRE Verbal Reasoning Practice Questions Vol.-1. 10TH. Chennai: Mc Grow Hill Education (India), 2019.
Cita MLA (9th ed.)ETS. Official GRE Verbal Reasoning Practice Questions Vol.-1. 10TH. Mc Grow Hill Education (India), 2019.
Atenció: Aquestes cites poden no estar 100% correctes.