S.T.A Pickett,editor, M.L Cadenasso, editor, Brian McGrath, editors
Springer, 2013
Buku Teks
Gans, Herbert J., author
The Free Press, 1982
Buku Teks
Abrahamson, Mark, author
Prentice-Hall, 1980
Buku Teks
Farr, Douglas, author
John Wiley & Sons, 2008
Buku Teks
Jan Lin; Christopher Mele
Routledge, 2005
Buku Teks