Citazione APA

De Vries, C. A., & De Vries, R. G. (2007). Childbirth Education in the 21st Century: An Immodest Proposal. Lamaze International.

Stile di citazione Chicago

De Vries, Charlotte A., e Raymond G. De Vries. Childbirth Education in the 21st Century: An Immodest Proposal. Lamaze International, 2007.

Citazione MLA

De Vries, Charlotte A., e Raymond G. De Vries. Childbirth Education in the 21st Century: An Immodest Proposal. Lamaze International, 2007.

Attenzione: Queste citazioni potrebbero non essere precise al 100%.