Ekman, L. C. (1962). Scenic geology of the Pacific Northwest. Binfords, & Mort.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रEkman, Leonard C. Scenic Geology of the Pacific Northwest. Portland, Or.: Binfords, & Mort, 1962.
एमएलए (8वां संस्करण) प्रशस्ति पत्रEkman, Leonard C. Scenic Geology of the Pacific Northwest. Binfords, & Mort, 1962.
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