APA (7th ed.) Citation

Clark, M. M. (1990). The tonal system of Igbo. Foris Publications.

Chicago Style (17th ed.) Citation

Clark, Mary Morris. The Tonal System of Igbo. Dordrecht, Holland ; Providence, RI, U.S.A.: Foris Publications, 1990.

MLA (9th ed.) Citation

Clark, Mary Morris. The Tonal System of Igbo. Foris Publications, 1990.