Eastman. (1961). Williams obstetrics. Appleton Century-crofts.
Cita Chicago Style (17a ed.)Eastman. Williams Obstetrics. Appleton Century-crofts, 1961.
Cita MLA (9a ed.)Eastman. Williams Obstetrics. Appleton Century-crofts, 1961.
Precaución: Estas citas no son 100% exactas.