Tatiana Valentine Guy, Miroslav Karny, David H. Wolpert, editors
[Springer, ], 2012
eBooks
Alkin, Marvin C., author
Sage, 1985
Buku Teks
edited by Dwaine Marvick
Free Press, 1961
Buku Teks SO
Dingle, J.
Arnold , 1997
Buku Teks
Porter, Gary A., 1950-, author
South-Western, 2001
Buku Teks