Cooper, Davina, author
Cambridge University Press, 2004
Buku Teks
Tawney, R.H., author
George Allen and Unwin, 1952
Buku Teks
Wu, Xiaoyun, author
China Renmin University Press, 2015
eBooks
Thunberg, Anne-Maria
Almqvist ,
Buku Teks
edited by Bernard Berelson
Information Agency, 1975
Buku Teks