Columbia subject headings:
Harvard subject headings:
Consumer contracts--European Union countries.
Consumer contracts--United States.
Consumer protection--European Union countries.
Consumer protection--United States
Sales--European Union countries.
Sales--United States.
Princeton subject headings:
Consumer contracts--European Union countries.
Consumer contracts--United States.
Consumer protection--European Union countries.
Consumer protection--United States.
Sales--European Union countries.
Sales--United States.