A course in phonetics

MLA

Ladefoged, Peter, and Keith Johnson. A Course In Phonetics. 7th ed. Stamford, CT: Cengage Learning, 2015.

APA

Ladefoged, P., & Johnson, K. (2015). A course in phonetics. 7th ed. Stamford, CT: Cengage Learning.

Chicago

Ladefoged, Peter., and Keith Johnson. A Course In Phonetics. 7th ed. Stamford, CT: Cengage Learning, 2015.