Quesada Pacheco, A. (2005). Web-Based Learning (WBL): A challenge for foreign languaje teachers. Universidad de Costa Rica.
Chicago Style (17th ed.) ZitazioaQuesada Pacheco, Allen. Web-Based Learning (WBL): A Challenge for Foreign Languaje Teachers. Universidad de Costa Rica, 2005.
MLA (9th ed.) ZitazioaQuesada Pacheco, Allen. Web-Based Learning (WBL): A Challenge for Foreign Languaje Teachers. Universidad de Costa Rica, 2005.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.