Viale, Riccardo
Springer, 2012
eBooks
Brown, Harold I., author
Routledge, 1988
Buku Teks
Sen, Amartya, 1933-, author
Oxford University Press, 2002
Buku Teks
Churchill, Gilbert A., author
The Dryden Press, 1995
Buku Teks
Churchill, Gilbert A., author
Thomson, 2005
Buku Teks