Spiller, R. E. (1963). The cycle of American literature: An essay in historical criticism (6th print.). New American Library.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSpiller, Robert Ernest. The Cycle of American Literature: An Essay in Historical Criticism. 6th print. New York: New American Library, 1963.
एमएलए (8वां संस्करण) प्रशस्ति पत्रSpiller, Robert Ernest. The Cycle of American Literature: An Essay in Historical Criticism. 6th print. New American Library, 1963.
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