APA (7th ed.) Citation

Duverger, M., North, B., & North, R. (1959). Political parties: Their organization and activity in the modern state. Methuen.

Chicago Style (17th ed.) Citation

Duverger, Maurice, Barbara North, and Robert North. Political Parties: Their Organization and Activity in the Modern State. London: Methuen, 1959.

MLA (9th ed.) Citation

Duverger, Maurice, et al. Political Parties: Their Organization and Activity in the Modern State. Methuen, 1959.