Hammersly, Martyn, author
Routledge, l995
Buku Teks
Murphy, Robert F., author
George Allen and Unwin, 1972
Buku Teks
Habermas, Jurgen, author
Heinemann, 1974
Buku Teks
Potter, Merle C., author
Erlangga, 2011
Buku Teks
Harris, Marvin, 1927-2001, author
Routledge & Kegan Paul LTD, 1969
Buku Teks