Sevilla Morales, H., & Gamboa Mena, R. (2015). Interactions 1 as an ELT coursebook: A curricular and theory-based scrutiny. Universidad de Costa Rica.
Chicago-čujuhus (17. p.)Sevilla Morales, Henry, juo Roy Gamboa Mena. Interactions 1 as an ELT Coursebook: A Curricular and Theory-based Scrutiny. Universidad de Costa Rica, 2015.
MLA-čujuhus (9. p.)Sevilla Morales, Henry, juo Roy Gamboa Mena. Interactions 1 as an ELT Coursebook: A Curricular and Theory-based Scrutiny. Universidad de Costa Rica, 2015.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.