APA

Swan M., Walter C., . (1993). The new Cambridge English course. Student 4, Upper-intermediate. Cambridge: Cambridge University Press.

Chicago

Swan Michael, Walter Catherine, . 1993. The new Cambridge English course. Student 4, Upper-intermediate. Cambridge: Cambridge University Press.

Harvard

Swan M., Walter C., . (1993). The new Cambridge English course. Student 4, Upper-intermediate. Cambridge: Cambridge University Press.

MLA

Swan Michael, Walter Catherine, . The new Cambridge English course. Student 4, Upper-intermediate. Cambridge: Cambridge University Press. 1993.