Không rõ. (2012). Internation Conference GMS 2020: Balancing Economic Growth and Environmental Sustainability. NOTNXB.
استشهاد بنمط شيكاغوKhông rõ. Internation Conference GMS 2020: Balancing Economic Growth and Environmental Sustainability. NOTNXB, 2012.
MLA استشهادKhông rõ. Internation Conference GMS 2020: Balancing Economic Growth and Environmental Sustainability. NOTNXB, 2012.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.