Washington (State). Department of Ecology. (2001). An aquatic plant identification manual for Washington's freshwater plants. The Dept..
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Washington (State). Department of Ecology. An Aquatic Plant Identification Manual for Washington's Freshwater Plants. [Olympia, Wash.]: The Dept., 2001.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Washington (State). Department of Ecology. An Aquatic Plant Identification Manual for Washington's Freshwater Plants. The Dept., 2001.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.