Washington State University, Washington (State). Department of Agriculture, & United States. Department of Agriculture. Crop protection guide for tree fruits in Washington. Washington State University Extension.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Washington State University, Washington (State). Department of Agriculture, و United States. Department of Agriculture. Crop Protection Guide for Tree Fruits in Washington. Pullman, WA: Washington State University Extension.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Washington State University, et al. Crop Protection Guide for Tree Fruits in Washington. Washington State University Extension.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.