Não informado. Philippine Abstracts. National Institute of Science and Technology, Division of Documentation.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Philippine Abstracts. Manila: National Institute of Science and Technology, Division of Documentation.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Philippine Abstracts. National Institute of Science and Technology, Division of Documentation.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.