APA (7th ed.) Citation

Spencer, C., Dyer, P., & Battersby, M. (1979). The world of Serge Diaghilev. Penguin Books.

Chicago Style (17th ed.) Citation

Spencer, Charles, Philip Dyer, and Martin Battersby. The World of Serge Diaghilev. Harmondsworth, Eng. ; New York: Penguin Books, 1979.

MLA (9th ed.) Citation

Spencer, Charles, et al. The World of Serge Diaghilev. Penguin Books, 1979.