Avanci, Barbara Soares, Elaine Antunes Cortez, Fernanda Salustiano Barbosa, e Keila Magalhães André. 2009. “Nurses’ Role Play in Perspective from Prenatal and Natural Childbirth Humanization Program: A Systematic Review Study”. Revista De Enfermagem UFPE on Line 3 (4). Recife:1126-33. https://doi.org/10.5205/reuol.581-3802-1-RV.0304200944.