Muirhead, M., & Gustavson, A. (2019). Flip!: How the Frisbee took flight. Charlesbridge.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रMuirhead, Margaret, और Adam Gustavson. Flip!: How the Frisbee Took Flight. Watertown, MA: Charlesbridge, 2019.
एमएलए (8वां संस्करण) प्रशस्ति पत्रMuirhead, Margaret, और Adam Gustavson. Flip!: How the Frisbee Took Flight. Charlesbridge, 2019.
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