Thomann, Lars, author
VS Verlag, 2011
eBooks
Robinson, Joan, author
Richard D. Irwin, 1956
Buku Teks
Hicks, John, author
Oxford Univeristy Press , 1965
Buku Teks
Coyle, Brian, author
CIB publis & Financial education, 2000
Buku Teks
Sherman, Andrew J., author
Amacom, 2005
Buku Teks