Grosvenor Press International, T.t.
Buku Teks
Grosvenor Press, 1986
Buku Teks
Grosvenor Press International, 1987
Buku Teks
Saunders, Robert J.
The John Hopkins University Press , 1976
Buku Teks
Third World Foundation for Social and Economics Studies, 1985
Buku Teks