Folsom, Ralph Haughwout
International trade and investment in a nutshell
South-Western Publishing, 1996
 Buku Teks
Folsom, Ralph Haughwout
International trade and investment
[publisher not identified], [date of publication not identified]
 Buku Teks
Root, Franklin R.
International trade and investment
South-Western Publishing, 1978
 Buku Teks
Root, Franklin R.
International trade and investment
International Thompson Publishing, 1994
 Buku Teks
Folsom, Ralph Haughwout
International trade and investment
[publisher not identified], [date of publication not identified]
 Buku Teks