Dyfyniad APA

Vargas-Morúa, G., & Vargas-Morúa, E. (2015). Polio Crisis in Costa Rica: Lessons Learned and Achievements.

Dyfyniad Arddull Chicago

Vargas-Morúa, Gioconda, y Elizarda Vargas-Morúa. Polio Crisis in Costa Rica: Lessons Learned and Achievements. 2015.

Dyfyniad MLA

Vargas-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.