Chen, Jerome, author
Oxford University Press, 1967
Buku Teks
Institute of Public Administration , 1965
Buku Teks
Wicksell, Knut
Rutledge & Kegan Paul LTD., 1951
Buku Teks
Malmberg, Bertil, editor
Lund , 1964
Buku Teks
Fischer, Michael M. J.
Harvard University Press, 1980
Buku Teks