APA (7th ed.) Citation

Day, A. J., & Degenhardt, H. W. (1980). Political parties of the world. Gale Research Co..

Chicago Style (17th ed.) Citation

Day, Alan J., and Henry W. Degenhardt. Political Parties of the World. Detroit, Mich.: Gale Research Co., 1980.

MLA (9th ed.) Citation

Day, Alan J., and Henry W. Degenhardt. Political Parties of the World. Gale Research Co., 1980.