Cita APA (7a ed.)
(1981). U.S. trade with Puerto Rico and U.S. possessions: July 1981. U.S. Department of Commerce.
Cita Chicago Style (17a ed.)
U.S. Trade with Puerto Rico and U.S. Possessions: July 1981. Washington: U.S. Department of Commerce, 1981.
Cita MLA (9a ed.)
U.S. Trade with Puerto Rico and U.S. Possessions: July 1981. U.S. Department of Commerce, 1981.
Precaución: Estas citas no son 100% exactas.