Titus, P., & Willson, J. R. (1961). Management of obstetric difficulties (6th ed.). Mosby.
Citazione stile Chigago Style (17a edizione)Titus, Paul, e J. Robert Willson. Management of Obstetric Difficulties. 6th ed. St. Louis: Mosby, 1961.
Citatione MLA (9a ed.)Titus, Paul, e J. Robert Willson. Management of Obstetric Difficulties. 6th ed. Mosby, 1961.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.