(2021). Official GRE Verbal Reasoning Practice Questions Volume 1 (2.). MC Graw Hill.
芝加哥风格引文Official GRE Verbal Reasoning Practice Questions Volume 1. 2. chennai: MC Graw Hill, 2021.
MLA引文Official GRE Verbal Reasoning Practice Questions Volume 1. 2. MC Graw Hill, 2021.
警告：这些引文格式不一定是100％准确.