Ministry of Finance and Economy, 1997
Buku Teks
Little, Brown and Co., 1959
Buku Teks
edited by John Hasseldine
Emerald, 2017
eBooks
Uppal, J.S., author
Gadjah Mada University Press , 1993
Buku Teks
Lehmann, Geoffrey, author
LBC Information Service, 1996
Buku Teks