APA (7th ed.) Citation

Fernando, R. A., & Doval Santos, E. L. (1976). Modern trigonometry: From the function standpoint. National Book Store.

Chicago Style (17th ed.) Citation

Fernando, R. A., and Esther L. Doval Santos. Modern Trigonometry: From the Function Standpoint. [Manila]: National Book Store, 1976.

MLA (9th ed.) Citation

Fernando, R. A., and Esther L. Doval Santos. Modern Trigonometry: From the Function Standpoint. National Book Store, 1976.