Cita APA (7th ed.)

Ziegel, E., & Van Blarcom, C. C. (1972). Obstetric nursing. Macmillan.

Cita Chicago (17th ed.)

Ziegel, Erna, i Carolyn Conant Van Blarcom. Obstetric Nursing. New York: Macmillan, 1972.

Cita MLA (9th ed.)

Ziegel, Erna, i Carolyn Conant Van Blarcom. Obstetric Nursing. Macmillan, 1972.