APA-referens (7:e uppl.)

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

Chicago-referens (17:e uppl.)

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

MLA-referens (9:e uppl.)

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