APA (7th ed.) Citation

Tapia, M. I. G. (1980). Trigmat manual. Integrated Research Center, De La Salle University.

Chicago Style (17th ed.) Citation

Tapia, Ma. Isabel G. Trigmat Manual. Manila: Integrated Research Center, De La Salle University, 1980.

MLA (9th ed.) Citation

Tapia, Ma. Isabel G. Trigmat Manual. Integrated Research Center, De La Salle University, 1980.