Finston, Harmon L., author
John Wiley & Sons, 1982
Buku Teks
Fitzpatrick, Tony, author
Palgrave Macmillan, 2005
Buku Teks
Jensen, William B., author
John Wiley & Sons, 1980
Buku Teks
Owen, Robert
J.M. Dent & Sons , 1949
Buku Teks
edited by Ross Vasta
Jessica Kingsley, c1992
Buku Teks