New directions and new structures for trade and development
United Nations
United Nations, 1977
 Buku Teks
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
Marcus, Edward
International trade and finance
Pitman, 1965
 Buku Teks SO