Williams, Raymond, author
The University of Chicago Press, , 1995
Buku Teks
Mannheim, Karl, author
Routledge & Kegan Paul, 1956
Buku Teks SO
Merrill, Francis E. (Francis Ellsworth), 1904-1969, author
Prentice-Hall, 1965
Buku Teks SO
McCarthy, E. Doyle, author
Routledge, 1996
Buku Teks
Brym, Robert J., author
Wadsworth and Cengage Learning, 2013
Buku Teks