APA (7th ed.) Citation

Boyd, J. D., & Hamilton, W. J. (1970). The human placenta. Heffer.

Chicago Style (17th ed.) Citation

Boyd, James Dixon, and William James Hamilton. The Human Placenta. Cambridge: Heffer, 1970.

MLA (9th ed.) Citation

Boyd, James Dixon, and William James Hamilton. The Human Placenta. Heffer, 1970.