Allen, J. (2018). Improving virtual reality. ReferencePoint Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रAllen, John. Improving Virtual Reality. San Diego, CA: ReferencePoint Press, 2018.
एमएलए (8वां संस्करण) प्रशस्ति पत्रAllen, John. Improving Virtual Reality. ReferencePoint Press, 2018.
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