Economic development and planning: essays in honour of Jan Tinbergen
edited by Willy Sellekaerts
Macmillan, 1974
 Buku Teks SO
Gipson, Carolyn R.
The McGraw-Hill dictionary of international trade and finance
McGraw-Hill, 1994
 Buku Referensi
King, Philip
International economics and international economic policy: a reader
McGraw-Hill , 1995
 Buku Teks SO
King, Philip
International economics and international economic policy: a reader
McGraww-Hill, 1990
 Buku Teks
Root, Franklin R.
International trade and investment
South-Western Publishing, 1978
 Buku Teks