APA (7th ed.) Citation

Watt, W. M. (1968). What is islam? Longmans.

Chicago Style (17th ed.) Citation

Watt, William Montgomery. What Is Islam? London Harlow: Longmans, 1968.

MLA (8th ed.) Citation

Watt, William Montgomery. What Is Islam? Longmans, 1968.

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