Dallas, D., & Iggulden, . M. (1990). Let's learn English. Longman.
芝加哥风格引文Dallas, Donald, 与 Margaret Iggulden. Let's Learn English. Harlow: Longman, 1990.
MLA引文Dallas, Donald, 与 Margaret Iggulden. Let's Learn English. Longman, 1990.
警告：这些引文格式不一定是100％准确.