Rugman, Alan M.
International business : firm and environment
McGraw-Hill, 1985
Buku Teks
The environment and international relations
edited by John Vogler and Mark F. Imber
Routledge , 1996
Buku Teks
Rugman, Alan M.
International business : firm and environment
McGraw-Hill , 1985
Buku Teks
Vernon, Raymond
Economic environment of international business
Prentice-Hall, 1981
Buku Teks
Vernon, Raymond
The Economic environment of international business
Prentice-Hall, 1972
Buku Teks