edited by Dorwin Cartwright, Alvin Zander
Harper & Row , 1968
Buku Teks
Beal, George M.
Iowa State University Press , 1962
Buku Teks
Collins, Barry E., author
John Wiley & Sons, 1964
Buku Teks
Baron, Robert S., author
Open University Press, 2003
Buku Teks
Homans, George Caspar, 1910-1989, author
Harcourt, Brace, 1950
Buku Teks