Webber, B., & Webber, M. (1998). "Terrible Tilly" Tillamook Rock Light House: The biography of a light house : an Oregon documentary (Expanded ed.). Webb Research Group.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWebber, Bert, और Margie Webber. "Terrible Tilly" Tillamook Rock Light House: The Biography of a Light House : An Oregon Documentary. Expanded ed. Medford, Ore: Webb Research Group, 1998.
एमएलए (9वां संस्करण) प्रशस्ति पत्रWebber, Bert, और Margie Webber. "Terrible Tilly" Tillamook Rock Light House: The Biography of a Light House : An Oregon Documentary. Expanded ed. Webb Research Group, 1998.
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