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.
芝加哥风格引文Panopio, Rolando G., Bernarda M. Elec, Marcelina C. Lerios, Myrna C. Belarmino, 与 Gemma A. Velasquez. Personalized System of Instruction (PSI) for College Algebra. Quezon City: University of the Philippines, Learning Resource Center, 1999.
MLA引文Panopio, Rolando G., et al. Personalized System of Instruction (PSI) for College Algebra. University of the Philippines, Learning Resource Center, 1999.
警告：这些引文格式不一定是100％准确.