Fernández Marín, K., Moncada Alemán, M., Cervantes Zúñiga, M., & German Chaves, S. (2015). The implementation of games based on cooperative learning principles to enhance the oral skills focused on the use of -s and -es inflections in two English foreign language groups. [Puntarenas, Costa Rica].

Fernández Marín, Karla, Mariflor Moncada Alemán, Marilyn Cervantes Zúñiga, and Silvia German Chaves. The Implementation of Games Based On Cooperative Learning Principles to Enhance the Oral Skills Focused On the Use of -s and -es Inflections in Two English Foreign Language Groups. [Puntarenas, Costa Rica], 2015.

Fernández Marín, Karla, Mariflor Moncada Alemán, Marilyn Cervantes Zúñiga, and Silvia German Chaves. The Implementation of Games Based On Cooperative Learning Principles to Enhance the Oral Skills Focused On the Use of -s and -es Inflections in Two English Foreign Language Groups. [Puntarenas, Costa Rica], 2015.