Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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