Mills, C. Wright, author
Grove Press, 1961
Buku Teks
Mills, C. Wright, author
Oxford University Press, 1978
Buku Teks
Riley, Matilda White
Harcourt, Brace and world, 1963
Buku Teks
Johnson, Doyle Paul, author
John Wiley , 1999
Buku Teks
Pareto, Vilfredo, author
Frederick A. Praeger, 1966
Buku Teks