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.
Παραπομπή σε μορφή Chicago (17η εκδ.)Bhutan. Ministry of Works & Human Settlement και 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.
Παραπομπή σε μορφή MLA (8th εκδ.)Bhutan. Ministry of Works & Human Settlement και 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.