APA aipamena

Purnell, R. (1973). Society of states: An introduction to international politics. Weidenfield & Nicolson.

Chicago Style aipamena

Purnell, Robert. Society of States: An Introduction to International Politics. London: Weidenfield & Nicolson, 1973.

MLA aipamena

Purnell, Robert. Society of States: An Introduction to International Politics. Weidenfield & Nicolson, 1973.