APA (7th ed.) Citation

Forty, S. (1981). American armor: 1939-45 portfolio. Stackpole Books.

Chicago Style (17th ed.) Citation

Forty, Simon. American Armor: 1939-45 Portfolio. Harrisburg, Pa.: Stackpole Books, 1981.

MLA (9th ed.) Citation

Forty, Simon. American Armor: 1939-45 Portfolio. Stackpole Books, 1981.

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