Appelrouth, Scott A., 1965-, author
Sage, 2012
Buku Teks
Ritzer, George, author
McGraw-Hill, 2012
Buku Teks
Heinemann Educational Books , 1973
Buku Teks
edited by Scott G. McNall
Little, Brown and Company, 1968
Buku Teks
Kinloch, Graham C., author
Prentice-Hall, 1981
Buku Teks