Columbia subject headings:
Harvard subject headings:
Free trade--Singapore.
Free trade--United States
Singapore--Foreign economic relations--United States.
United States--Foreign economic relations--Singapore.
Princeton subject headings:
Free trade--Singapore.
Free trade--United States.
Regionalism--Asia.
Singapore--Commercial policy.
Singapore--Foreign economic relations--United States.
United States--Commercial policy.
United States--Foreign economic relations--Singapore.