Bonnet, R. L., & Keen, D. (2010). Home run!: Science projects with baseball and softball. Enslow Publishers.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBonnet, Robert L., और Dan Keen. Home Run!: Science Projects with Baseball and Softball. Berkeley Heights, NJ: Enslow Publishers, 2010.
एमएलए (8वां संस्करण) प्रशस्ति पत्रBonnet, Robert L., और Dan Keen. Home Run!: Science Projects with Baseball and Softball. Enslow Publishers, 2010.
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