Cita APA (7a ed.)

Stapledon, G., & Waller, R. (1964). Human ecology. Faber & Faber.

Cita Chicago Style (17a ed.)

Stapledon, George, y Robert Waller. Human Ecology. London: Faber & Faber, 1964.

Cita MLA (9a ed.)

Stapledon, George, y Robert Waller. Human Ecology. Faber & Faber, 1964.