Easterbrook, D. J., & Rahm, D. A. (1970). Landforms of Washington: The geologic environment. Printed by Union Print. Co.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रEasterbrook, Don J., और David A. Rahm. Landforms of Washington: The Geologic Environment. Bellingham, Wash.: Printed by Union Print. Co, 1970.
एमएलए (8वां संस्करण) प्रशस्ति पत्रEasterbrook, Don J., और David A. Rahm. Landforms of Washington: The Geologic Environment. Printed by Union Print. Co, 1970.
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