APA (7th ed.) Citation

Engels, F., McLellan, D., & Kelley, F. (2009). The condition of the working class in England. Oxford University Press.

Chicago Style (17th ed.) Citation

Engels, Friedrich, David McLellan, and Florence Kelley. The Condition of the Working Class in England. Oxford ; New York: Oxford University Press, 2009.

MLA (9th ed.) Citation

Engels, Friedrich, et al. The Condition of the Working Class in England. Oxford University Press, 2009.