APA (7th ed.) Citation

Ziegler, P. (1990). King Edward VIII: The official biography. William Collins.

Chicago Style (17th ed.) Citation

Ziegler, Philip. King Edward VIII: The Official Biography. London: William Collins, 1990.

MLA (9th ed.) Citation

Ziegler, Philip. King Edward VIII: The Official Biography. William Collins, 1990.

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