Không rõ. (2012). Internation Conference GMS 2020: Balancing Economic Growth and Environmental Sustainability. NOTNXB.
শিকাগো স্টাইলে সাইটেশনKhông rõ. Internation Conference GMS 2020: Balancing Economic Growth and Environmental Sustainability. NOTNXB, 2012.
এমএলএ সাইটেশনKhông rõ. Internation Conference GMS 2020: Balancing Economic Growth and Environmental Sustainability. NOTNXB, 2012.
সতর্কবাণী: সাইটেশন সবসময় 100% নির্ভুল হতে পারে না.