Bhutan. Ministry of Works & Human Settlement & Bhutan. Ministry of Works & Human Settlement. Policy and Planning Division. (2006). Annual information bulletin. Policy and Planning Division, Ministry of Works and Human Settlement, Royal Govt. of Bhutan.
Chicago-referens (17:e uppl.)Bhutan. Ministry of Works & Human Settlement och Bhutan. Ministry of Works & Human Settlement. Policy and Planning Division. Annual Information Bulletin. Thimphu: Policy and Planning Division, Ministry of Works and Human Settlement, Royal Govt. of Bhutan, 2006.
MLA-referens (8:e uppl.)Bhutan. Ministry of Works & Human Settlement och Bhutan. Ministry of Works & Human Settlement. Policy and Planning Division. Annual Information Bulletin. Policy and Planning Division, Ministry of Works and Human Settlement, Royal Govt. of Bhutan, 2006.