Depok : FISIP UI
Majalah, Jurnal, Buletin
Dahl, Robert A., 1915-2014, author
Prentice-Hall, 1978
Buku Teks
Grabowsky, Adolf, 1880-1969
Heymanns, [1971]
Buku Teks
Dunn, William N., author
Gadjah Mada University Press , 2003
Buku Teks
edited by Joseph S. Wholey
Jossey-Bass Publishers, 1994
Buku Teks