Gaya APA

rogerson, P., gilbert, J, B. (1990). Speaking Clearly Pronunciation and Listening Comprehension for Learners of English . [s.i.]: .

Gaya MLA

rogerson, Pamela., gilbert, Judy, B.. "Speaking Clearly Pronunciation and Listening Comprehension for Learners of English". [s.i.]: , 1990. Text.