Gaya APA

Rogerson, P, -, A., Gilbert, J, -, A. (1990). Speaking Clearly Student's Book: Pronounciation and Listening Comprehension for Learners of English (ed 1). Australia: Press Syndicate of the University of Cambridge.

Gaya MLA

Rogerson, Pamela, -, A., Gilbert, Judy, -, A. "Speaking Clearly Student's Book: Pronounciation and Listening Comprehension for Learners of English". ed 1 Australia: Press Syndicate of the University of Cambridge, 1990. Text.