Duke University Press, 1987
Buku Teks
Gelfand, M.A., author
Unesco, 1971
Buku Teks
Sommerlad, E.Lloyd, author
University Press, 1966
Buku Teks
Myint, Hla, author
Hutchinson University Library, 1973
Buku Teks
Hilling, David, author
Routledge, 1996
Buku Teks