Tawney, R.H.
George Allen and Unwin, 1952
Buku Teks
hapus4
China Renmin University Press, 2015
eBooks
edited by Hugo A. Bedau
Prentice-Hall, 1971
Buku Teks SO
Thunberg, Anne-Maria
Almqvist ,
Buku Teks
edited by Bernard Berelson
Voice of America, 1975
Buku Teks