APA (7th ed.) Citation

Gunston & Spick. (1998). Modern fighting helicopters (Rev. ed.). Salamander Books.

Chicago Style (17th ed.) Citation

Gunston and Spick. Modern Fighting Helicopters. Rev. ed. London: Salamander Books, 1998.

MLA (8th ed.) Citation

Gunston and Spick. Modern Fighting Helicopters. Rev. ed. Salamander Books, 1998.