Ahmad Sadri
Oxford University Press, 1992
Buku Teks
Mannheim, Karl, author
Routledge & Kegan Paul, 1956
Buku Teks
Anthem Press, 2016
eBooks
Acuff, F. Gene, author
The Dryden Press, 1973
Buku Teks
Schrag, Clarence C., author
Harper & Row, 1963
Buku Teks