APA

Betrán A. P., Gulmezoglu A. M., Robson M., Merialdi M., Souza J. P., Wojdyla D., Widmer M., Carroli G., Torloni M. R., Langer A., Narváez A., Velasco A., Faúndes A., Acosta A., Valladares E., Romero M., Zavaleta N., Reynoso S. & Bataglia V. (20091214). WHO global survey on maternal and perinatal health in Latin America: classifying caesarean sections. : Reproductive health.

Chicago

Betrán Ana P, Gulmezoglu A Metin, Robson Michael, Merialdi Mario, Souza João P, Wojdyla Daniel, Widmer Mariana, Carroli Guillermo, Torloni Maria R, Langer Ana, Narváez Alberto, Velasco Alejandro, Faúndes Anibal, Acosta Arnaldo, Valladares Eliette, Romero Mariana, Zavaleta Nelly, Reynoso Sofia and Bataglia Vicente. 20091214. WHO global survey on maternal and perinatal health in Latin America: classifying caesarean sections. : Reproductive health.

Harvard

Betrán A. P., Gulmezoglu A. M., Robson M., Merialdi M., Souza J. P., Wojdyla D., Widmer M., Carroli G., Torloni M. R., Langer A., Narváez A., Velasco A., Faúndes A., Acosta A., Valladares E., Romero M., Zavaleta N., Reynoso S. and Bataglia V. (20091214). WHO global survey on maternal and perinatal health in Latin America: classifying caesarean sections. : Reproductive health.

MLA

Betrán Ana P, Gulmezoglu A Metin, Robson Michael, Merialdi Mario, Souza João P, Wojdyla Daniel, Widmer Mariana, Carroli Guillermo, Torloni Maria R, Langer Ana, Narváez Alberto, Velasco Alejandro, Faúndes Anibal, Acosta Arnaldo, Valladares Eliette, Romero Mariana, Zavaleta Nelly, Reynoso Sofia and Bataglia Vicente. WHO global survey on maternal and perinatal health in Latin America: classifying caesarean sections. : Reproductive health. 20091214.