APA ציטוט

WHO. (1989). Environmental health criteria; N.89: Formaldehyde. Geneva: WHO.

Trích dẫn kiểu Chicago

WHO. Environmental Health Criteria; N.89: Formaldehyde. Geneva: WHO, 1989.

ציטוט MLA

WHO. Environmental Health Criteria; N.89: Formaldehyde. Geneva: WHO, 1989.