Perrin, Karen M., author
Jones & Bartlett Learning, 2015
Buku Teks
Suchman, Edward A., author
Russell Sage Foundation, 1967
Buku Teks
Chatburn, Robert L., author
Jones & Bartlett Learning, 2011
Buku Teks
Garrett, Thomas M., author
Prentice-Hall, 2001
Buku Teks
Drummond, Michael F., author
Oxford University Press, 1989
Buku Teks