Titus, P., & Willson, J. R. (1961). Management of obstetric difficulties (6th ed.). Mosby.
Cita Chicago Style (17a ed.)Titus, Paul, y J. Robert Willson. Management of Obstetric Difficulties. 6th ed. St. Louis: Mosby, 1961.
Cita MLA (9a ed.)Titus, Paul, y J. Robert Willson. Management of Obstetric Difficulties. 6th ed. Mosby, 1961.
Precaución: Estas citas no son 100% exactas.