Cita APA (7th ed.)

Landicho, E. D. C., & Alferez, M. S. (2007). MSA textbook in trigonometry (Year 2007 ed.). MSA Academic Advancement Institute.

Cita Chicago (17th ed.)

Landicho, Elizabeth D. C., i Merle S. Alferez. MSA Textbook in Trigonometry. Year 2007 ed. Quezon City: MSA Academic Advancement Institute, 2007.

Cita MLA (9th ed.)

Landicho, Elizabeth D. C., i Merle S. Alferez. MSA Textbook in Trigonometry. Year 2007 ed. MSA Academic Advancement Institute, 2007.