APA aipamena

National environment agency. (1998). Vietnam green guide 1998. Vietnam: National environment agency.

Chicago Style aipamena

National environment agency. Vietnam Green Guide 1998. Vietnam: National environment agency, 1998.

MLA aipamena

National environment agency. Vietnam Green Guide 1998. Vietnam: National environment agency, 1998.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.