edited by Linda M. Whiteford and Lenore Manderson
Lynne Rienner, 2000
Buku Teks
Starling, Grover, author
Dorsey Press, 1979
Buku Teks
Wilensky, Harold L., author
Free Press, 1965
Buku Teks
Cambridge University Press, 2005
Buku Teks
Gilbert, Neil, author
Prentice-Hall, 1986
Buku Teks