George, K. O., & Tilley, D. (2002). Swimming upstream: Middle school poems. Houghton Mifflin Harcourt.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रGeorge, Kristine O'Connell, और Debbie Tilley. Swimming Upstream: Middle School Poems. Boston: Houghton Mifflin Harcourt, 2002.
एमएलए (8वां संस्करण) प्रशस्ति पत्रGeorge, Kristine O'Connell, और Debbie Tilley. Swimming Upstream: Middle School Poems. Houghton Mifflin Harcourt, 2002.
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