APA aipamena

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

Chicago Style aipamena

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

MLA aipamena

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

Kontuz: berrikusi erreferentzia hauek erabili aurretik.