Litterer, Joseph August, 1926-, author
John Wiley & Sons, 1980
Buku Teks
Miles, Robert H.
Goodyear Publishing Company, 1980
Buku Teks
Pinder, Craig C., author
Psychology Press, Taylor & Francis Group, 2008
Buku Teks
Kolb, David A., author
Prentice-Hall, 1991
Buku Teks
Downey, H. Kirk
West Publishing, 1977
Buku Teks