APA (7th ed.) Citation

Wicksell, K., Classen, E. 1., & Robbins, L. C. (1934). Lectures on political economy. G. Routledge.

Chicago Style (17th ed.) Citation

Wicksell, Knut, Ernest 1881 Classen, and Lionel Charles Robbins. Lectures on Political Economy. London: G. Routledge, 1934.

MLA (9th ed.) Citation

Wicksell, Knut, et al. Lectures on Political Economy. G. Routledge, 1934.