Hernández Herrero, A. (2005). Content-based instruction in an english oral communication course at the University of Costa Rica. Universidad de Costa Rica.
Lua i Stíl Chicago (17ú heag.)Hernández Herrero, Annabelle. Content-based Instruction in an English Oral Communication Course at the University of Costa Rica. Universidad de Costa Rica, 2005.
Lua MLA (9ú heag.)Hernández Herrero, Annabelle. Content-based Instruction in an English Oral Communication Course at the University of Costa Rica. Universidad de Costa Rica, 2005.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.