APA (7th ed.) Citation

Knowles, G. (1987). Patterns of spoken English : an introduction to English phonetics / Gerald Knowles: An introduction to English phonetics. Longman.

Chicago Style (17th ed.) Citation

Knowles, Gerald. Patterns of Spoken English : An Introduction to English Phonetics / Gerald Knowles: An Introduction to English Phonetics. London: Longman, 1987.

MLA (9th ed.) Citation

Knowles, Gerald. Patterns of Spoken English : An Introduction to English Phonetics / Gerald Knowles: An Introduction to English Phonetics. Longman, 1987.

Warning: These citations may not always be 100% accurate.