Lê, Q. A. (1996). Chương trình hành động 21: (AGENDA 21) = Environmental management & global and national strategy on environment protection. Hà Nội: Environmental Management and Impact Assessment.
শিকাগো স্টাইলে সাইটেশনLê, Quý An. Chương Trình Hành động 21: (AGENDA 21) = Environmental Management & Global and National Strategy On Environment Protection. Hà Nội: Environmental Management and Impact Assessment, 1996.
এমএলএ সাইটেশনLê, Quý An. Chương Trình Hành động 21: (AGENDA 21) = Environmental Management & Global and National Strategy On Environment Protection. Hà Nội: Environmental Management and Impact Assessment, 1996.
সতর্কবাণী: সাইটেশন সবসময় 100% নির্ভুল হতে পারে না.