Cita APA (7th ed.)

Ong, M., Sy, B., Tiu, D., & Tupaz, J. F. (1993). An Information systems study on Philippine Phosphate Fertilizer Corporation. College of Engineering.

Cita Chicago (17th ed.)

Ong, Michael, Bernabeth Sy, Daniel Tiu, i Jovi Francis Tupaz. An Information Systems Study on Philippine Phosphate Fertilizer Corporation. Diliman, Quezon City: College of Engineering, 1993.

Cita MLA (9th ed.)

Ong, Michael, et al. An Information Systems Study on Philippine Phosphate Fertilizer Corporation. College of Engineering, 1993.