APA (7th ed.) Citation

Ripley. (1998). Modern military helicopters. HarperCollins Publishers.

Chicago Style (17th ed.) Citation

Ripley. Modern Military Helicopters. London New York: HarperCollins Publishers, 1998.

MLA (8th ed.) Citation

Ripley. Modern Military Helicopters. HarperCollins Publishers, 1998.

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