Jossey-Bass, 1973
Buku Teks
Universitas Indonesia, 1993
UI - Skripsi (Membership)
Ordeshook, Peter C., author
Routledge, 1992
Buku Teks
Duncan, Otis Dudley, author
The Free Press of Glencoe, 1961
Buku Teks
Rappaz, Michel, author
Springer-Verlag, 2003
Buku Teks