Weiss, Carol H.
Usaha Nasional, 1984
Buku Teks
Guba, Egon G., author
Jossey-Bass , 1981
Buku Teks
Suchman, Edward A., author
Russell Sage Foundation, 1967
Buku Teks
edited by Dennis J. Palumbo
Sage, 1987
Buku Teks
edited by Joseph S. Wholey, Harry P. Hatry and Kathryn E. Newcomer
Jossey-Bass, 1994
Buku Referensi