APA Цитирование

Barrientos, Z., & Umaña, R. (2009). Student attrition in posgraduate blended programs at the Universidad Estatal a Distancia (UNED), Costa Rica: Desertion or delay?

Chicago-стиль цитирования

Barrientos, Zaidett, y Roy Umaña. Student Attrition in Posgraduate Blended Programs At the Universidad Estatal a Distancia (UNED), Costa Rica: Desertion or Delay? 2009.

MLA-цитирование

Barrientos, Zaidett, y Roy Umaña. Student Attrition in Posgraduate Blended Programs At the Universidad Estatal a Distancia (UNED), Costa Rica: Desertion or Delay? 2009.

Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.