Morrison, Eileen E.
Jones and Bartlett, 2016
Buku Teks
Alkin, Marvin C.
Sage, 1985
Buku Teks
Tatiana Valentine Guy, Miroslav Karny, David H. Wolpert, editors
[Springer, ], 2012
eBooks
Harris, Dean M., 1951-
Jossey-Bass, 2011.
Buku Teks
Dingle, J.
Arnold , 1997
Buku Teks