Swan, M., & Walter, C. (1988). The Cambridge English course 1: Practice book [with key]. Cambridge: Cambridge University Press.
Trích dẫn kiểu ChicagoSwan, Michael, và Catherine Walter. The Cambridge English Course 1: Practice Book [with Key]. Cambridge: Cambridge University Press, 1988.
MLA引文Swan, Michael, và Catherine Walter. The Cambridge English Course 1: Practice Book [with Key]. Cambridge: Cambridge University Press, 1988.
警告：這些引文格式不一定是100％准確.