Spokane Ministerial Association & Orton, T. (1909). Souvenir: "Billy" Sunday Spokane campaign (official), December-January-February, 1908-1909. Western Colportage Association.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSpokane Ministerial Association और Trevor Orton. Souvenir: "Billy" Sunday Spokane Campaign (official), December-January-February, 1908-1909. [Spokane: Western Colportage Association, 1909.
एमएलए (8वां संस्करण) प्रशस्ति पत्रSpokane Ministerial Association और Trevor Orton. Souvenir: "Billy" Sunday Spokane Campaign (official), December-January-February, 1908-1909. Western Colportage Association, 1909.
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