Lamb, Charles W., author
Houghton Mifflin, 1987
Buku Teks
Ceriello, Vincent R., author
Lexington Books , 1991
Buku Teks
Folks, J. Leroy, author
John Wiley & Sons, 1981
Buku Teks
Lamont, Douglas, author
Blackwell Publishers, 1996
Buku Referensi
[edited by] Michael J. Kavanagh, Mohan Thite, Richard D. Johnson
Sage, 2015
Buku Teks