Citazione Stile APA (7a Edizione)

Williams, J. W., Pritchard, J. A., MacDonald, P. C. 1., & Grant, N. F. (1985). Williams obstetrics. Appleton-Century-Crofts.

Citazione stile Chigago Style (17a edizione)

Williams, J. Whitridge, Jack A. Pritchard, Paul C. 1930 MacDonald, e Norman F. Grant. Williams Obstetrics. Norwalk, CT: Appleton-Century-Crofts, 1985.

Citatione MLA (9a ed.)

Williams, J. Whitridge, et al. Williams Obstetrics. Appleton-Century-Crofts, 1985.