APA (7th ed.) Citation

Hornby, W. F., & Jones, M. (1980). An introduction to population geography. Cambridge University Press.

Chicago Style (17th ed.) Citation

Hornby, William Fredric, and Melvyn Jones. An Introduction to Population Geography. Cambridge [etc.]: Cambridge University Press, 1980.

MLA (9th ed.) Citation

Hornby, William Fredric, and Melvyn Jones. An Introduction to Population Geography. Cambridge University Press, 1980.