Denhardt, Robert B., author
Thomson/Wadsworth, 2004
Buku Teks
Denhardt, Robert B., author
Cengage Learning, 2015
Buku Teks
Rainey, Hal G., author
Jossey-Bass, 2014
Buku Teks
Self, Peter, author
George Allen & Unwin, 1974
Buku Teks
Tompkins, Jonathan R., author
Wadsworth, 2005
Buku Teks