WHO. (1993). Environmental health criteria; N.155: Biomarkers and risk assessment: consepts and principles. Geneva: WHO.
استشهاد بنمط شيكاغوWHO. Environmental Health Criteria; N.155: Biomarkers and Risk Assessment: Consepts and Principles. Geneva: WHO, 1993.
MLA استشهادWHO. Environmental Health Criteria; N.155: Biomarkers and Risk Assessment: Consepts and Principles. Geneva: WHO, 1993.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.