Russell, Bertrend
Unwin Paperbacks, 1963
Buku Teks
Sederberg, Peter C.
Chandler & Sharp Publishers, 1977
Buku Teks
Scott Frickel; Kelly Moore, editor
University of Wisconsin Press , 2006
Buku Teks
edited by David Ingram
Blackwell , 2002
Buku Teks
Lasswell, Harold D.
Routledge & Kegan Paul, 1952
Buku Teks