APA (7th ed.) Citation

Layard, R., King, J., & Moser, C. (1969). The impact of robbins. Penguin Books.

Chicago Style (17th ed.) Citation

Layard, Richard, John King, and Claus Moser. The Impact of Robbins. Harmondsworth, Middlesex, Eng.: Penguin Books, 1969.

MLA (9th ed.) Citation

Layard, Richard, et al. The Impact of Robbins. Penguin Books, 1969.