APA-viite (7. p.)

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

Chicago-viite (17. p.)

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

MLA-viite (9. p.)

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