APA (7th ed.) Citation

Summerfield, G. (1968). Voices: The third book. Penguin Education.

Chicago Style (17th ed.) Citation

Summerfield, Goeffrey. Voices: The Third Book. Harmondsworth: Penguin Education, 1968.

MLA (9th ed.) Citation

Summerfield, Goeffrey. Voices: The Third Book. Penguin Education, 1968.