Gilbert, C., Luxenberg, G. A., & Tolon, M. (1990). Historic landscape report: Spalding Unit, Nez Perce National Historical Park, Idaho. U.S. Dept. of the Interior, National Park Service, Pacific Northwest Region, Cultural Resources Division.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Gilbert, Cathy, Gretchen A. Luxenberg, و Marsha Tolon. Historic Landscape Report: Spalding Unit, Nez Perce National Historical Park, Idaho. Seattle, Wash.: U.S. Dept. of the Interior, National Park Service, Pacific Northwest Region, Cultural Resources Division, 1990.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Gilbert, Cathy, et al. Historic Landscape Report: Spalding Unit, Nez Perce National Historical Park, Idaho. U.S. Dept. of the Interior, National Park Service, Pacific Northwest Region, Cultural Resources Division, 1990.