Cruz, E. D. (2000). Product innovation: A review of the issue. College of Business Administration, University of the Philippines.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रCruz, Edison D. Product Innovation: A Review of the Issue. Quezon City: College of Business Administration, University of the Philippines, 2000.
एमएलए (9वां संस्करण) प्रशस्ति पत्रCruz, Edison D. Product Innovation: A Review of the Issue. College of Business Administration, University of the Philippines, 2000.
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