APA (7th ed.) Citation

Greene, G. (1970). The Heart of the Matter. Penguin Books.

Chicago Style (17th ed.) Citation

Greene, Graham. The Heart of the Matter. Hardmondsworth: Penguin Books, 1970.

MLA (9th ed.) Citation

Greene, Graham. The Heart of the Matter. Penguin Books, 1970.

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