APA (7th ed.) Citation

(2005). Political parties of the world (6. ed., 1. publ.). Harper.

Chicago Style (17th ed.) Citation

Political Parties of the World. 6. ed., 1. publ. London: Harper, 2005.

MLA (9th ed.) Citation

Political Parties of the World. 6. ed., 1. publ. Harper, 2005.