Cita APA (7th ed.)

Cunningham, f. g. (2005). williams obstetrics 22 nd edition. McGraw-Hill Book Company.

Cita Chicago (17th ed.)

Cunningham, f. gary. Williams Obstetrics 22 Nd Edition. McGraw-Hill Book Company, 2005.

Cita MLA (9th ed.)

Cunningham, f. gary. Williams Obstetrics 22 Nd Edition. McGraw-Hill Book Company, 2005.