APA-viite (7. p.)

Tupas, T. R. F. (2002). Second language teaching. University of the Philippines Open University.

Chicago-viite (17. p.)

Tupas, T. Ruanni F. Second Language Teaching. Quezon City: University of the Philippines Open University, 2002.

MLA-viite (9. p.)

Tupas, T. Ruanni F. Second Language Teaching. University of the Philippines Open University, 2002.