Paulson, Edward
The complete ideal's guide starting your own business
Prenada Media, 2003
Buku Teks
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 2007
The World Bank, 2007
Buku Teks
Doing business in 2004
Wold Bank, 2004
Buku Teks