Rose 1977, p. 24: "[T]here can be no doubt that since at least the tenth century no external power has controlled Bhutan, although there have been periods when various of its neighbors have been able to exert a strong cultural and/or political influence there." Rose, Leo E. (1977), The Politics of Bhutan, Cornell University Press, ISBN978-0-8014-0909-7
Worden 1991, "Origins and Early Settlement, AD 600–1600" Worden, Robert L. (1991), "Bhutan", in Savada, Andrea Matles (ed.), Nepal and Bhutan: Country Studies, Library of Congress. This article incorporates text from this source, which is in the public domain.
Worden 1991, "Arrival of Buddhism" Worden, Robert L. (1991), "Bhutan", in Savada, Andrea Matles (ed.), Nepal and Bhutan: Country Studies, Library of Congress. This article incorporates text from this source, which is in the public domain.
Worden 1991, "Rivalry among the Sects" Worden, Robert L. (1991), "Bhutan", in Savada, Andrea Matles (ed.), Nepal and Bhutan: Country Studies, Library of Congress. This article incorporates text from this source, which is in the public domain.
Worden 1991, "Consolidation and Defeat of Tibetan Invasions, 1616–51" (pp. 256–257) Worden, Robert L. (1991), "Bhutan", in Savada, Andrea Matles (ed.), Nepal and Bhutan: Country Studies, Library of Congress. This article incorporates text from this source, which is in the public domain.
Worden 1991, "Administrative Integration and Conflict with Tibet, 1651–1728" (pp. 257–258) Worden, Robert L. (1991), "Bhutan", in Savada, Andrea Matles (ed.), Nepal and Bhutan: Country Studies, Library of Congress. This article incorporates text from this source, which is in the public domain.
Worden 1991, "Civil Conflict, 1728–72" (pp. 258–259) Worden, Robert L. (1991), "Bhutan", in Savada, Andrea Matles (ed.), Nepal and Bhutan: Country Studies, Library of Congress. This article incorporates text from this source, which is in the public domain.
Worden 1991, "British Intrusion, 1772–1907" (pp. 259–261) Worden, Robert L. (1991), "Bhutan", in Savada, Andrea Matles (ed.), Nepal and Bhutan: Country Studies, Library of Congress. This article incorporates text from this source, which is in the public domain.
Worden 1991, "Establishment of the Hereditary Monarchy, 1907" Worden, Robert L. (1991), "Bhutan", in Savada, Andrea Matles (ed.), Nepal and Bhutan: Country Studies, Library of Congress. This article incorporates text from this source, which is in the public domain.
Worden 1991, "Development of Centralized Government, 1926–52" Worden, Robert L. (1991), "Bhutan", in Savada, Andrea Matles (ed.), Nepal and Bhutan: Country Studies, Library of Congress. This article incorporates text from this source, which is in the public domain.
Worden 1991, "Modernization under Jigme Dorji, 1952–72" Worden, Robert L. (1991), "Bhutan", in Savada, Andrea Matles (ed.), Nepal and Bhutan: Country Studies, Library of Congress. This article incorporates text from this source, which is in the public domain.
Worden 1991, "Entering the Outside World, 1972–present" Worden, Robert L. (1991), "Bhutan", in Savada, Andrea Matles (ed.), Nepal and Bhutan: Country Studies, Library of Congress. This article incorporates text from this source, which is in the public domain.