Duncan, R. Ideas of the Meaning of form ; Often I am permitted to return to a meadow: Robert Duncan. American Poetologics and Poems by Twentieth-Century Poets.(1996).
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रDuncan, Robert. "Ideas of the Meaning of Form ; Often I Am Permitted to Return to a Meadow: Robert Duncan." American Poetologics and Poems by Twentieth-Century Poets.(1996) .
एमएलए (8वां संस्करण) प्रशस्ति पत्रDuncan, Robert. "Ideas of the Meaning of Form ; Often I Am Permitted to Return to a Meadow: Robert Duncan." American Poetologics and Poems by Twentieth-Century Poets.(1996), .
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