Cita APA

Wehby, G. L., Murray, J. C., Castilla, E. E., López Camelo, J. S., & Ohsfeldt, R. L. (2009). Prenatal care effectiveness and utilization in Brazil. Web

Citación estilo Chicago

Wehby, George L., Jeffrey C. Murray, Eduardo Enrique Castilla, Jorge Santiago López Camelo, and Robert L. Ohsfeldt. Prenatal Care Effectiveness and Utilization in Brazil. 2009.

Cita MLA

Wehby, George L., et al. Prenatal Care Effectiveness and Utilization in Brazil. 2009.