Vargas-Morúa, G., & Vargas-Morúa, E. (2015). Polio Crisis in Costa Rica: Lessons Learned and Achievements.
Dyfyniad Arddull ChicagoVargas-Morúa, Gioconda, y Elizarda Vargas-Morúa. Polio Crisis in Costa Rica: Lessons Learned and Achievements. 2015.
Dyfyniad MLAVargas-Morúa, Gioconda, y Elizarda Vargas-Morúa. Polio Crisis in Costa Rica: Lessons Learned and Achievements. 2015.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.