WHO. (1993). Environmental health criteria; N.144: Principles for evaluating chemical effects on the aged population. Geneva: WHO.
শিকাগো স্টাইলে সাইটেশনWHO. Environmental Health Criteria; N.144: Principles for Evaluating Chemical Effects On the Aged Population. Geneva: WHO, 1993.
এমএলএ সাইটেশনWHO. Environmental Health Criteria; N.144: Principles for Evaluating Chemical Effects On the Aged Population. Geneva: WHO, 1993.
সতর্কবাণী: সাইটেশন সবসময় 100% নির্ভুল হতে পারে না.