Não informado. (2021). Research Division Bulletin. Virginia Polytechnique Institute and State University.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Research Division Bulletin. Blacksburg, Va: Virginia Polytechnique Institute and State University, 2021.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Research Division Bulletin. Virginia Polytechnique Institute and State University, 2021.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.