Neuman, William Lawrence, 1950-
Allyn and Bacon, 2003
Buku Teks
Punch, Keith F.
SAGE Publications, 1998
Buku Teks
Neuman, William Lawrence, 1950-
Allyn and Bacon, 1994
Buku Teks
Grinnell, Richard M.
F.E. Peacock Publishers, 2001
Buku Teks
Neuman, William Lawrence, 1950-
Pearson/Allyn and Bacon, 2006
Buku Teks