ebrary, Inc, & American Water Works Association. (2002). Simplified procedures for water examination (5th ed.). American Water Works Association.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)ebrary, Inc, و American Water Works Association. Simplified Procedures for Water Examination. 5th ed. Denver, CO: American Water Works Association, 2002.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)ebrary, Inc, و American Water Works Association. Simplified Procedures for Water Examination. 5th ed. American Water Works Association, 2002.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.