Sapp, R. (2009). Gun digest book of trap & skeet shooting (5th ed.). Krause Publications.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSapp, Rick. Gun Digest Book of Trap & Skeet Shooting. 5th ed. Iola, WI: Krause Publications, 2009.
एमएलए (8वां संस्करण) प्रशस्ति पत्रSapp, Rick. Gun Digest Book of Trap & Skeet Shooting. 5th ed. Krause Publications, 2009.
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