Cita APA (7th ed.)

Castillo, J. C., Dujunco, M. K., Gonzales, P. N., & Luna, B. H. A. (1990). A Systems and procedures study on the UP Health Service. College of Engineering.

Cita Chicago (17th ed.)

Castillo, Joseph C., Mildred K. Dujunco, Pinky N. Gonzales, i Baby Helen A. Luna. A Systems and Procedures Study on the UP Health Service. Diliman, Quezon City: College of Engineering, 1990.

Cita MLA (9th ed.)

Castillo, Joseph C., et al. A Systems and Procedures Study on the UP Health Service. College of Engineering, 1990.