Cita APA (7th ed.)

Cruz, V. J. F. (1991). A Study of a purchasing system. College of Engineering.

Cita Chicago (17th ed.)

Cruz, Victoria Jocelyn F. A Study of a Purchasing System. Diliman, Quezon City: College of Engineering, 1991.

Cita MLA (9th ed.)

Cruz, Victoria Jocelyn F. A Study of a Purchasing System. College of Engineering, 1991.