Cristobal, A. S. (2006). The role of intellectual property in National Development. Manila Times.
Chicago Style (17. basım) AtıfCristobal, Adrian S. "The Role of Intellectual Property in National Development." Manila Times 2006.
MLA (9th ed.) AtıfCristobal, Adrian S. "The Role of Intellectual Property in National Development." Manila Times, 2006.
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