Jakeman, V., & Mcdowell, C. (2001). IELTS practice tests plus 1. Longman.
芝加哥风格引文Jakeman, Vanessa, 与 Clare Mcdowell. IELTS Practice Tests Plus 1. Harlow, [England]: Longman, 2001.
MLA引文Jakeman, Vanessa, 与 Clare Mcdowell. IELTS Practice Tests Plus 1. Longman, 2001.
警告：这些引文格式不一定是100％准确.