Vance, Stanley C., author
Prentice-Hall, 1961
Buku Teks
Kirkpatrick, Colin H., author
George Allen and Unwin, 1984
Buku Teks
Florence, P. Sargant
Sweet & Maxwell, 1961
Buku Teks
edited by Chalmers Johnson; [contributors, Eugene Bardach ... and others]
Calif ICS Press , 1984
Buku Teks
Mund, Vernon A., author
Appleton-Century-Crofts, 1971
Buku Teks