APA (7th ed.) Citation

CHRISTOPHERSEN, P. (1956). An english phonetics. Longmans; London, Longmans.

Chicago Style (17th ed.) Citation

CHRISTOPHERSEN, Paul. An English Phonetics. Ikeja, Acera: Longmans; London, Longmans, 1956.

MLA (9th ed.) Citation

CHRISTOPHERSEN, Paul. An English Phonetics. Longmans; London, Longmans, 1956.