APA (7th ed.) Citation

Harbour, D. (2001). An intelligent person's guide to atheism. Duckworth.

Chicago Style (17th ed.) Citation

Harbour, Daniel. An Intelligent Person's Guide to Atheism. London: Duckworth, 2001.

MLA (9th ed.) Citation

Harbour, Daniel. An Intelligent Person's Guide to Atheism. Duckworth, 2001.

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