APA (7th ed.) Citation

Nickel, H. (1971). Arms and armour through the ages (Rev. ed.). Collins.

Chicago Style (17th ed.) Citation

Nickel, Helmut. Arms and Armour Through the Ages. Rev. ed. London: Collins, 1971.

MLA (9th ed.) Citation

Nickel, Helmut. Arms and Armour Through the Ages. Rev. ed. Collins, 1971.