Cita APA

Hirst, B. C. (1912). A text-book of obstetrics (7th ed., rev. and enl.). W.B. Saunders Company.

Citación estilo Chicago

Hirst, Barton Cooke. A Text-book of Obstetrics. 7th ed., rev. and enl. Philadelphia: W.B. Saunders Company, 1912.

Cita MLA

Hirst, Barton Cooke. A Text-book of Obstetrics. 7th ed., rev. and enl. W.B. Saunders Company, 1912.