APA (7th ed.) Citation

Slim, W. S. (1970). Unofficial history. Corgi Books.

Chicago Style (17th ed.) Citation

Slim, William Slim. Unofficial History. London: Corgi Books, 1970.

MLA (8th ed.) Citation

Slim, William Slim. Unofficial History. Corgi Books, 1970.

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