APA (7th ed.) Citation

Crampton, W. G. (1984). The new observer's book of flags: William G. Crampton (New, rev. ed.). Warne.

Chicago Style (17th ed.) Citation

Crampton, William G. The New Observer's Book of Flags: William G. Crampton. New, rev. ed. London: Warne, 1984.

MLA (8th ed.) Citation

Crampton, William G. The New Observer's Book of Flags: William G. Crampton. New, rev. ed. Warne, 1984.