APA (7th ed.) Citation

Owen, R., & Sutcliffe, B. (1972). Studies in the theory of imperialism. Longman.

Chicago Style (17th ed.) Citation

Owen, Roger, and Bob Sutcliffe. Studies in the Theory of Imperialism. Harlow: Longman, 1972.

MLA (9th ed.) Citation

Owen, Roger, and Bob Sutcliffe. Studies in the Theory of Imperialism. Longman, 1972.