Washington State University. Cooperative Extension. Spokane County & Fitzgerald, T. J. (1990). Native and adapted landscape plant list for the Inland Northwest. Washington State University, Cooperative Extension, Spokane County.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Washington State University. Cooperative Extension. Spokane County و Tonie Jean Fitzgerald. Native and Adapted Landscape Plant List for the Inland Northwest. Spokane, Wash.: Washington State University, Cooperative Extension, Spokane County, 1990.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Washington State University. Cooperative Extension. Spokane County و Tonie Jean Fitzgerald. Native and Adapted Landscape Plant List for the Inland Northwest. Washington State University, Cooperative Extension, Spokane County, 1990.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.