World Health Organization & World Health Organization. Principles and methods for the assessment of risk from essential trace elements.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)World Health Organization و World Health Organization. Principles and Methods for the Assessment of Risk from Essential Trace Elements.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)World Health Organization و World Health Organization. Principles and Methods for the Assessment of Risk from Essential Trace Elements.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.