Peterson, C., & Upitis, A. (1999). Century farm: One hundred years on a family farm (1st. ed.). Boyds Mills Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रPeterson, Cris, और Alvis Upitis. Century Farm: One Hundred Years on a Family Farm. 1st. ed. Honesdale, Penn.: Boyds Mills Press, 1999.
एमएलए (8वां संस्करण) प्रशस्ति पत्रPeterson, Cris, और Alvis Upitis. Century Farm: One Hundred Years on a Family Farm. 1st. ed. Boyds Mills Press, 1999.
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