Cita APA

Leveno, K. J. (2003). Williams manual of obstetrics (21st ed.). McGraw-Hill.

Citación estilo Chicago

Leveno, Kenneth J. Williams Manual of Obstetrics. 21st ed. Boston: McGraw-Hill, 2003.

Cita MLA

Leveno, Kenneth J. Williams Manual of Obstetrics. 21st ed. McGraw-Hill, 2003.