APA (7 ম সংস্করণ) উদ্ধৃতি

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

শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতি

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

M.L.A (9 ম সংস্করণ) উদ্ধৃতি

Elec, Bernarda M., et al. Personalized System of Instruction (PSI) for College Algebra. Learning Resource Center, University of the Philippines, 1999.