Ibarra, M. C. A., Leung, M. F. P., & Magpili, L. M. M. (1992). A Work study on Playpen Export Philippines. College of Engineering.
芝加哥风格引文Ibarra, Ma. Celeste A., Ma. Felicia P. Leung, 与 Luna Mylene M. Magpili. A Work Study on Playpen Export Philippines. Diliman, Quezon City: College of Engineering, 1992.
MLA引文Ibarra, Ma. Celeste A., et al. A Work Study on Playpen Export Philippines. College of Engineering, 1992.
警告：这些引文格式不一定是100％准确.