United States. Forest Service. Pacific Northwest Region. (1975). Steamboatin' on the Snake. U.S. Forest Service, Wallowa-Whitman National Forest.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)United States. Forest Service. Pacific Northwest Region. Steamboatin' on the Snake. Baker, Or.: U.S. Forest Service, Wallowa-Whitman National Forest, 1975.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)United States. Forest Service. Pacific Northwest Region. Steamboatin' on the Snake. U.S. Forest Service, Wallowa-Whitman National Forest, 1975.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.