Srivastava, G.P., author
Chand , 1965
Buku Teks
State University of New York Press, 2006
Buku Teks
Amerasinghe, Chittharanjan Felix, 1933-, author
Clarendon Press, 1988
Buku Teks
Mosher, William E.
Civil Service Assembly, 1941
Buku Teks
Kracke, E. A.
Harvard University Press, 1953
Buku Teks