Crampton, W. G. (1979). The observer's book of flags: William G. Crampton (New ed.). Warne.
Cita Chicago (17th ed.)Crampton, William G. The Observer's Book of Flags: William G. Crampton. New ed. London: Warne, 1979.
Cita MLA (8th ed.)Crampton, William G. The Observer's Book of Flags: William G. Crampton. New ed. Warne, 1979.
Atenció: Aquestes cites poden no estar 100% correctes.