Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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