Columbia subject headings:
Electronic commerce--Chile.
Electronic commerce--Singapore.
Electronic commerce--United States.
Service industries--Chile.
Service industries--Singapore.
Service industries--United States.
United States--Commercial treaties.
Harvard subject headings:
Electronic commerce--Chile.
Electronic commerce--Singapore.
Electronic commerce--United States
Service industries--Chile.
Service industries--Singapore.
Service industries--United States
United States--Commercial treaties.
Princeton subject headings:
Electronic commerce--Chile.
Electronic commerce--Singapore.
Electronic commerce--United States.
Service industries--Chile.
Service industries--Singapore.
Service industries--United States.
United States--Commercial treaties.