Hernández Herrero, A. (2005). Content-based instruction in an english oral communication course at the University of Costa Rica. Universidad de Costa Rica.
Čikaški stil citiranja (17. izdanje)Hernández Herrero, Annabelle. Content-based Instruction in an English Oral Communication Course at the University of Costa Rica. Universidad de Costa Rica, 2005.
MLA način citiranja (9. izdanje)Hernández Herrero, Annabelle. Content-based Instruction in an English Oral Communication Course at the University of Costa Rica. Universidad de Costa Rica, 2005.
Upozorenje: Ovi citati možda nisu uvijek 100% točni.