APA (7th ed.) Citation

Ovsyany, I. (1989). The origins of world war two.

Chicago Style (17th ed.) Citation

Ovsyany, Igor. The Origins of World War Two. 1989.

MLA (8th ed.) Citation

Ovsyany, Igor. The Origins of World War Two. 1989.

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