R.H. Sudhartin
Fakultas Ilmu Sosial dan Ilmu Politik Universitas Indonesia, 1997
UI - Tesis Membership
Stebbins, Richard P.
Harper & Brothers, 1960
Buku Teks SO
Penrose, E.F. [Ernest Francis], 1895-1984
Princeton University Press, 1953
Buku Teks
Andrerson, James E.
Addison-Wesley, 1970
Buku Teks SO
Knauth, Oswald
Columbia University Press, 1956
Buku Teks