APA (7th ed.) Citation

Panopio, R. G., Elec, B. M., Lerios, M. C., Belarmino, M. C., & Velasquez, G. A. (1999). Personalized System of Instruction (PSI) for college algebra. University of the Philippines, Learning Resource Center.

Chicago Style (17th ed.) Citation

Panopio, Rolando G., Bernarda M. Elec, Marcelina C. Lerios, Myrna C. Belarmino, and Gemma A. Velasquez. Personalized System of Instruction (PSI) for College Algebra. Quezon City: University of the Philippines, Learning Resource Center, 1999.

MLA (9th ed.) Citation

Panopio, Rolando G., et al. Personalized System of Instruction (PSI) for College Algebra. University of the Philippines, Learning Resource Center, 1999.