Andrews, R. W. (1968). Timber: Toil and trouble in the big woods ([1st ed.].). Superior Pub. Co.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रAndrews, Ralph W. Timber: Toil and Trouble in the Big Woods. [1st ed.]. Seattle: Superior Pub. Co, 1968.
एमएलए (8वां संस्करण) प्रशस्ति पत्रAndrews, Ralph W. Timber: Toil and Trouble in the Big Woods. [1st ed.]. Superior Pub. Co, 1968.
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