Cita APA (7th ed.)

Ibarra, M. C. A., Leung, M. F. P., & Magpili, L. M. M. (1992). A Work study on Playpen Export Philippines. College of Engineering.

Cita Chicago (17th ed.)

Ibarra, Ma. Celeste A., Ma. Felicia P. Leung, i Luna Mylene M. Magpili. A Work Study on Playpen Export Philippines. Diliman, Quezon City: College of Engineering, 1992.

Cita MLA (9th ed.)

Ibarra, Ma. Celeste A., et al. A Work Study on Playpen Export Philippines. College of Engineering, 1992.