APA (7th ed.) Citation

Clark, J. E., & Yallop, C. (1991). An introduction to phonetics and phonology. Basil Blackwell.

Chicago Style (17th ed.) Citation

Clark, John Ellery, and Colin Yallop. An Introduction to Phonetics and Phonology. Oxford [etc.]: Basil Blackwell, 1991.

MLA (9th ed.) Citation

Clark, John Ellery, and Colin Yallop. An Introduction to Phonetics and Phonology. Basil Blackwell, 1991.

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