Cita APA (7th ed.)

Trueman, A. E., Whittow, J. B., & Hardy, J. R. (1971). Geology and scenery in England and Wales (New ed., completely revised.). Penguin.

Cita Chicago (17th ed.)

Trueman, A. E., J. B. Whittow, i John Richard Hardy. Geology and Scenery in England and Wales. New ed., completely revised. Harmondsworth: Penguin, 1971.

Cita MLA (8th ed.)

Trueman, A. E., et al. Geology and Scenery in England and Wales. New ed., completely revised. Penguin, 1971.