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
Czinkota, Michael R.
International business
The Dryden Press, 1994
 Buku Teks
Wild, John J.
International business
Prentice Hall International, 2001
 Buku Teks
Czinkota, Michael R.
International business
The Dryden Press, 1992
 Buku Teks