APA (7th ed.) Citation

Forty. (2002). World war I: A visual encyclopedia. Greenwich Editions.

Chicago Style (17th ed.) Citation

Forty. World War I: A Visual Encyclopedia. London: Greenwich Editions, 2002.

MLA (8th ed.) Citation

Forty. World War I: A Visual Encyclopedia. Greenwich Editions, 2002.

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