Bateman, Sam, author
Routledge, 2020
eBooks
Chamberlain, Neil W. (Neil Wolverton), author
McGraw-Hill, 1980
Buku Teks
National Training Laboratories Institute for Applied Behavioral Science
Institute for Applied Behavioral Science, 1968
Buku Teks
Lowry, Robert
St Leonards Allen & Unwin 1996
Buku Teks
edited by Sydney Nettleton Fisher
Cornell University Press , 1955
Buku Teks