APA (7th ed.) Citation

Derry, J. W. (1968). Political parties. Macmillan; St Martin's P..

Chicago Style (17th ed.) Citation

Derry, John W. Political Parties. London, New York: Macmillan; St Martin's P., 1968.

MLA (8th ed.) Citation

Derry, John W. Political Parties. Macmillan; St Martin's P., 1968.