Barrantes Torres, D., Bonilla Matamoros, G., Saravia Vargas, J. R., & Solís Pérez, N. (2013). The Increase in Percentage of Students Who Actually Do Homework by Means of Communicative Out-of-Class Tasks instead of Homework Assignments: A Case Study of Adult EFL Students in the Conversation Courses at The University of Costa Rica.

Barrantes Torres, Daniela, Gerson Bonilla Matamoros, José Roberto Saravia Vargas, và Nathalia Solís Pérez. The Increase in Percentage of Students Who Actually Do Homework By Means of Communicative Out-of-Class Tasks Instead of Homework Assignments: A Case Study of Adult EFL Students in the Conversation Courses At The University of Costa Rica. 2013.

Barrantes Torres, Daniela, Gerson Bonilla Matamoros, José Roberto Saravia Vargas, và Nathalia Solís Pérez. The Increase in Percentage of Students Who Actually Do Homework By Means of Communicative Out-of-Class Tasks Instead of Homework Assignments: A Case Study of Adult EFL Students in the Conversation Courses At The University of Costa Rica. 2013.