Cita APA (7th ed.)

Siongco, N., Ignacio, D., Limjoco, A., & Del Rosario, C. (1990). Ortigas & Co. Limited Partnership: A systems analysis. College of Engineering.

Cita Chicago (17th ed.)

Siongco, Nilo, Dick Ignacio, Anna Limjoco, i Cecile Del Rosario. Ortigas & Co. Limited Partnership: A Systems Analysis. Diliman, Quezon City: College of Engineering, 1990.

Cita MLA (9th ed.)

Siongco, Nilo, et al. Ortigas & Co. Limited Partnership: A Systems Analysis. College of Engineering, 1990.