Spokane Ministerial Association & Orton, T. (1909). Souvenir: "Billy" Sunday Spokane campaign (official), December-January-February, 1908-1909. Western Colportage Association.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Spokane Ministerial Association و Trevor Orton. Souvenir: "Billy" Sunday Spokane Campaign (official), December-January-February, 1908-1909. [Spokane: Western Colportage Association, 1909.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Spokane Ministerial Association و Trevor Orton. Souvenir: "Billy" Sunday Spokane Campaign (official), December-January-February, 1908-1909. Western Colportage Association, 1909.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.