Stewart, W. (2010). You're the umpire: 139 scenarios to test your baseball knowledge. Skyhorse Pub..
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रStewart, Wayne. You're the Umpire: 139 Scenarios to Test Your Baseball Knowledge. New York: Skyhorse Pub., 2010.
एमएलए (8वां संस्करण) प्रशस्ति पत्रStewart, Wayne. You're the Umpire: 139 Scenarios to Test Your Baseball Knowledge. Skyhorse Pub., 2010.
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