Elias, C.E. Jr
Wadsworth, 1965
Buku Teks
Triana Maulidina, author
Fakultas Ilmu Sosial dan Ilmu Politik Universitas Indonesia, 2018
UI - Skripsi Membership
Abrahamson, Mark, author
Prentice-Hall, 1980
Buku Teks
Bish, Robert L., author
McGraw-Hill Kogakusha, 1975
Buku Teks
Eames, Edwin
The Free Press, 1973
Buku Teks