APA (7th ed.) Citation

Kopf, G. (1981). The engine. Heinemann Educational Books.

Chicago Style (17th ed.) Citation

Kopf, George. The Engine. London: Heinemann Educational Books, 1981.

MLA (9th ed.) Citation

Kopf, George. The Engine. Heinemann Educational Books, 1981.

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