Zimmer, J. (1997). Labor of love: Mothers share the joy of childbirth. Wiley.
Citazione stile Chigago Style (17a edizione)Zimmer, Judith. Labor of Love: Mothers Share the Joy of Childbirth. New York: Wiley, 1997.
Citatione MLA (8a ed.)Zimmer, Judith. Labor of Love: Mothers Share the Joy of Childbirth. Wiley, 1997.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.