Cita APA (7th ed.)

Willson, J. R., & Carrington, E. R. (1979). Obestetrics and gynecology (6th ed.). C.V. Mosby.

Cita Chicago (17th ed.)

Willson, J. Robert, i Elsie Reid Carrington. Obestetrics and Gynecology. 6th ed. St. Louis, Missouri: C.V. Mosby, 1979.

Cita MLA (9th ed.)

Willson, J. Robert, i Elsie Reid Carrington. Obestetrics and Gynecology. 6th ed. C.V. Mosby, 1979.