Johnson, Doyle Paul, author
John Wiley , 1999
Buku Teks
Pareto, Vilfredo, author
Frederick A. Praeger, 1966
Buku Teks
Ritzer, George, author
McGraw-Hill, 2012
Buku Teks
edited by Kenneth Thomson and Jeremy Tunstall
Penguin Books, 1983
Buku Teks
Carrabine, Eamonn, author
Routledge, 2009
Buku Referensi