Rudin, Richard, author
Focal Press, 2002
Buku Teks
O`Brien, Dan, author
Polity Press, 2006
Buku Teks
Rescher, Nicholas, author
State University of New York Press, 2003
Buku Teks
Mannheim, Karl, author
Harcourt, Brace, 1954
Buku Teks
Dell, J. A., author
Univ. Press , 2013
Buku Teks