Root, Franklin R.
International trade and investment
South-Western Publishing, 1978
 Buku Teks SO
Root, Franklin R.
International trade and investment
South-Western Publishing, 1978
 Buku Teks SO
Root, Franklin R.
International trade and investment
International Thompson Publishing, 1994
 Buku Teks SO
Gipson, Carolyn R.
The McGraw-Hill dictionary of international trade and finance
McGraw-Hill, 1994
 Buku Referensi
Appleyard, Dennis R.
International economics
McGraw-Hill, 2014
 Buku Teks SO