Diaz, P. H., I.Co, M. R., Vinuya, T. T., & Macaspac, Z. S. (1997). Personal Entrepreneurial Development Course. Office of Academic Support and Instructional Services. UP Open University.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रDiaz, Paz H., Myrna R. I.Co, Theodosia T. Vinuya, और Zenaida S. Macaspac. Personal Entrepreneurial Development Course. Quezon City: Office of Academic Support and Instructional Services. UP Open University, 1997.
एमएलए (9वां संस्करण) प्रशस्ति पत्रDiaz, Paz H., et al. Personal Entrepreneurial Development Course. Office of Academic Support and Instructional Services. UP Open University, 1997.
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