Cita APA (7th ed.)

Titus, P., & Willson, J. R. (1961). Management of obstetric difficulties (6th ed.). Mosby.

Cita Chicago (17th ed.)

Titus, Paul, i J. Robert Willson. Management of Obstetric Difficulties. 6th ed. St. Louis: Mosby, 1961.

Cita MLA (9th ed.)

Titus, Paul, i J. Robert Willson. Management of Obstetric Difficulties. 6th ed. Mosby, 1961.