Gaya APA

Nunan, D., Lockwood, J. (1991). The Australian English Course: Task-based English for post-beginners, Student's book 1 . Australia: Cambridge Univ. Press.

Gaya MLA

Nunan, David., Lockwood, Jane. "The Australian English Course: Task-based English for post-beginners, Student's book 1". Australia: Cambridge Univ. Press, 1991. Text.