University of the Philippines, Learning Resource Center, Elec, B. M., Lerios, M. C., Belarmino, M. C., Velasquez, G. A., & Panopio, R. G. (1999). Personalized System of Instruction (PSI) for college algebra. University of the Philippines, Learning Resource Center.
Chicagoスタイル(17版)引用形式University of the Philippines, Learning Resource Center, Bernarda M. Elec, Marcelina C. Lerios, Myrna C. Belarmino, Gemma A. Velasquez, , Rolando G. Panopio. Personalized System of Instruction (PSI) for College Algebra. Quezon City: University of the Philippines, Learning Resource Center, 1999.
MLA(9版)引用形式University of the Philippines, Learning Resource Center, et al. Personalized System of Instruction (PSI) for College Algebra. University of the Philippines, Learning Resource Center, 1999.