David Evans and Associates & Washington Water Power Company. (1991). Lower Spokane River project comprehensive recreation plan: Draft. David Evans & Associates.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)David Evans and Associates و Washington Water Power Company. Lower Spokane River Project Comprehensive Recreation Plan: Draft. Spokane, Wash.: David Evans & Associates, 1991.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)David Evans and Associates و Washington Water Power Company. Lower Spokane River Project Comprehensive Recreation Plan: Draft. David Evans & Associates, 1991.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.