APA (7th ed.) Citation

Sprigge, T. (1984). Theories of existence. Penguin Books.

Chicago Style (17th ed.) Citation

Sprigge, T.L.S. Theories of Existence. Penguin Books, 1984.

MLA (8th ed.) Citation

Sprigge, T.L.S. Theories of Existence. Penguin Books, 1984.

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