edited by Gun R. Semin, Klaus Fiedler
Sage, 1996
Buku Teks
edited by Leonard Bickman
Sage, 1982
Buku Teks
edited by Leonard Bickman
Sage, 1983
Buku Teks
edited by Frank W. Schneider, Jamie A. Gruman, Larry M. Coutts
Sage , 2012
Buku Teks
Nicolson, Paula
MacMillan Education, 1986
Buku Teks