National environment agency. (1998). Vietnam green guide 1998. Vietnam: National environment agency.
シカゴスタイル引用形National environment agency. Vietnam Green Guide 1998. Vietnam: National environment agency, 1998.
MLA引用形式National environment agency. Vietnam Green Guide 1998. Vietnam: National environment agency, 1998.
警告: この引用は必ずしも正確ではありません.