American Public Health Association & American Water Works Association. (2017). Standard methods for the examination of water and wastewater: Y American public health association (Twenty-third edition.). The Association.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)American Public Health Association و American Water Works Association. Standard Methods for the Examination of Water and Wastewater: Y American Public Health Association. Twenty-third edition. New York: The Association, 2017.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)American Public Health Association و American Water Works Association. Standard Methods for the Examination of Water and Wastewater: Y American Public Health Association. Twenty-third edition. The Association, 2017.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.