Found in articles
Science and Technology, in cooperation with United Nations Environment Programme, Regional Office for Asia and the Pacific, आइएसबिएन 978-92-9115-033-5।
Agriculture Organization of the United Nations Regional Office for Asia and the Pacific, मूलबाट २९ नोभेम्बर २०१४-मा सङ्ग्रहित, अन्तिम पहुँच २७ जुलाई २०१५।