Reid, Esmond
MIT Press, 1984
Buku Teks
Bryant, Peter, 1937-, author
Basic Books, 1974
Buku Teks
Bennett, Jeffrey, author
Addison-Wesely, 2008
Buku Teks
Dipboye, Robert L., author
Harcourt Brace College, 1994
Buku Teks
Wilensky, Robert, author
Addison-Wesley, 1983
Buku Teks