edited by Nick L. Smith
Sage, 1982
Buku Teks
Isaac, Stephen, author
University Associates, 1981
Buku Teks
edited by Joseph S. Wholey
Jossey-Bass Publishers, 1994
Buku Teks
edited by Albert N. Link, Nicholas S. Vonortas
Edward Elgar, 2013
Buku Teks
Alkin, Marvin C., author
Sage, 1985
Buku Teks