Robinson, Richard D.
International business policy / Richard D. Robinson
Rinehart and Winston, 1964
 Buku Teks
Czinkota, Michael R.
International business
The Dryden Press , 1996
 Buku Teks
Wild, John J.
International business
Prentice-Hall, 2003
 Buku Teks
Wormald, Avison
International business
Pan Books, 1973
 Buku Teks
Czinkota, Michael R.
International business
The Dryden Press, 1994
 Buku Teks