García y Garma, Irma Olaya. «Donald P. Warwick, Bitter Pills, Population Policies & Their Implementation in Eight Developing Countries, Cambridge University Press, 1983, 229 P». Estudios Demográficos y Urbanos 18, no. 03 (julio 1, 1984): 493–495. Accedido julio 1, 2025. https://estudiosdemograficosyurbanos.colmex.mx/index.php/edu/article/view/1674.