Cunningham, F. G., & Williams, J. W. (1997). Williams obstetrics. Appleton & Lange; Prentice-Hall International.
Cita Chicago Style (17a ed.)Cunningham, F. Gary, y John Whitridge Williams. Williams Obstetrics. Norwalk, CT: Appleton & Lange; Prentice-Hall International, 1997.
Cita MLA (9a ed.)Cunningham, F. Gary, y John Whitridge Williams. Williams Obstetrics. Appleton & Lange; Prentice-Hall International, 1997.
Precaución: Estas citas no son 100% exactas.