Michael West. (1967). Improve your English. London: Longman.
Trích dẫn kiểu ChicagoMichael West. Improve Your English. London: Longman, 1967.
MLA引文Michael West. Improve Your English. London: Longman, 1967.
警告：這些引文格式不一定是100％准確.
APA引文