Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.