Titus, P., & Willson, J. R. (1961). Management of obstetric difficulties (6th ed.). Mosby.
Chicago Style (17. basım) AtıfTitus, Paul, ve J. Robert Willson. Management of Obstetric Difficulties. 6th ed. St. Louis: Mosby, 1961.
MLA (9th ed.) AtıfTitus, Paul, ve J. Robert Willson. Management of Obstetric Difficulties. 6th ed. Mosby, 1961.
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