Cita APA (7th ed.)

Abarra, G., Katigbak, C., & Lim, A. (2002). A Study of the production system of Excelta Trading Corporation. College of Engineering.

Cita Chicago (17th ed.)

Abarra, Geraldine, Cristal Katigbak, i Angelito Lim. A Study of the Production System of Excelta Trading Corporation. Diliman, Quezon City: College of Engineering, 2002.

Cita MLA (9th ed.)

Abarra, Geraldine, et al. A Study of the Production System of Excelta Trading Corporation. College of Engineering, 2002.