edited by Joseph S. Wholey
Jossey-Bass Publishers, 1994
Buku Teks
edited by Joseph S. Wholey, Harry P. Hatry and Kathryn E. Newcomer
Jossey-Bass, 1994
Buku Referensi
Dunn, William N.
Hanindita, 1988
Buku Teks
Dunn, William N., author
Gadjah Mada University Press , 2003
Buku Teks SO
by Peter Knoepfel ... [and others]
Policy Press, 2007
Buku Teks