APA (7th ed.) Citation

Day, A. J., Degenhardt, H. W., & Ó Maoláin, C. (1988). Political parties of the world (3rd edition (revised and updated).). Longman.

Chicago Style (17th ed.) Citation

Day, Alan J., Henry W. Degenhardt, and Ciarán Ó Maoláin. Political Parties of the World. 3rd edition (revised and updated). Harlow, Essex: Longman, 1988.

MLA (9th ed.) Citation

Day, Alan J., et al. Political Parties of the World. 3rd edition (revised and updated). Longman, 1988.