Villanueva, S. L. (1971). The profile of the science department head in the Greater Manila Area. s.n.].
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रVillanueva, Soledad L. The Profile of the Science Department Head in the Greater Manila Area. [Quezon City: s.n.], 1971.
एमएलए (9वां संस्करण) प्रशस्ति पत्रVillanueva, Soledad L. The Profile of the Science Department Head in the Greater Manila Area. s.n.], 1971.
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