ETS. (2019). Official GRE Verbal Reasoning Practice Questions Vol.-1 (10TH.). Mc Grow Hill Education (India).
Citazione stile Chigago Style (17a edizione)ETS. Official GRE Verbal Reasoning Practice Questions Vol.-1. 10TH. Chennai: Mc Grow Hill Education (India), 2019.
Citatione MLA (9a ed.)ETS. Official GRE Verbal Reasoning Practice Questions Vol.-1. 10TH. Mc Grow Hill Education (India), 2019.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.