Vargas Solís, M. A., Arias Carranza, J., Chambers Ellis, G., Ramírez Chavarría, A., & Vargas Carranza, Y. (2019). Teacher's guide for unit 3 of the English Curriculum, First Grade.

Vargas Solís, María Antonieta, Jennifer Arias Carranza, George Chambers Ellis, Anyelin Ramírez Chavarría, ja Yoseth Vargas Carranza. Teacher's Guide for Unit 3 of the English Curriculum, First Grade. 2019.

Vargas Solís, María Antonieta, et al. Teacher's Guide for Unit 3 of the English Curriculum, First Grade. 2019.