Villamarzo, P. C., Cruz, E. E., & Relis, J. G. (2003). Functional oral communication (Rev. ed.). University of Santo Tomas Pub. House.
Chicago Style (17. basım) AtıfVillamarzo, Perla C., Estrella E. Cruz, ve Josephine G. Relis. Functional Oral Communication. Rev. ed. Manila: University of Santo Tomas Pub. House, 2003.
MLA (9th ed.) AtıfVillamarzo, Perla C., et al. Functional Oral Communication. Rev. ed. University of Santo Tomas Pub. House, 2003.
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