Del Castillo, M. I., Ong, V., & Sanchez, A. (1989). A Systems study on the Parts Distribution Department of Monark Equipment Corporation. College of Engineering.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Del Castillo, Ma. Isabel, Victoria Ong, و Ariel Sanchez. A Systems Study on the Parts Distribution Department of Monark Equipment Corporation. Diliman, Quezon City: College of Engineering, 1989.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Del Castillo, Ma. Isabel, et al. A Systems Study on the Parts Distribution Department of Monark Equipment Corporation. College of Engineering, 1989.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.