Paulson, Edward
The complete ideal's guide starting your own business
Prenada Media, 2003
Buku Teks SO
Collins business German
edited by Stephen Clarke
Harper Collins, 1995
Buku Referensi
Doing business in Japan: an insider's guide / general editor, Jane Withey
Prentice-Hall, 1994
Buku Teks
Doing business in Singapore
Price Waterhouse, 1966
Buku Teks
Doing business 2007
The World Bank, 2007
Buku Teks