APA (7th ed.) Citation

Derbyshire, J. D., & Derbyshire, I. (1996). Political systems of the world / J Denis Derbyshire, IanDerbyshire (2nd ed.). Helicon.

Chicago Style (17th ed.) Citation

Derbyshire, J. Denis, and Ian Derbyshire. Political Systems of the World / J Denis Derbyshire, IanDerbyshire. 2nd ed. Oxford: Helicon, 1996.

MLA (9th ed.) Citation

Derbyshire, J. Denis, and Ian Derbyshire. Political Systems of the World / J Denis Derbyshire, IanDerbyshire. 2nd ed. Helicon, 1996.

Warning: These citations may not always be 100% accurate.