Cita APA (7a ed.)

Potter, S. (1971). Language in the modern world (1st ed., repr.). Penguin.

Cita Chicago Style (17a ed.)

Potter, Simeon. Language in the Modern World. 1st ed., repr. Harmondsworth [etc.]: Penguin, 1971.

Cita MLA (9a ed.)

Potter, Simeon. Language in the Modern World. 1st ed., repr. Penguin, 1971.