MLA

Barraclough, E. M. C., and W. G Crampton. Flags of the World. 2nd ed., with revisions and suppl. London: F. Warne, 1981.

APA

Barraclough, E. M. C., & Crampton, W. G. (1981). Flags of the world. 2nd ed., with revisions and suppl. London: F. Warne.

Chicago

Barraclough, E. M. C., and W. G. Crampton. Flags of the World. 2nd ed., with revisions and suppl. London: F. Warne, 1981.