Style de citation APA (7e éd.)

Derbyshire, J. D., & Derbyshire, I. (1989). Chambers political systems of the world. Chambers.

Style de citation Chicago (17e éd.)

Derbyshire, J. Denis, et Ian Derbyshire. Chambers Political Systems of the World. Edinburgh: Chambers, 1989.

Style de citation MLA (9e éd.)

Derbyshire, J. Denis, et Ian Derbyshire. Chambers Political Systems of the World. Chambers, 1989.