(1971). Amendment of title 35, United States Code. April 20, 1971. -- Ordered to be printed. [electronic resource].
Cita Chicago (17th ed.)Amendment of Title 35, United States Code. April 20, 1971. -- Ordered to Be Printed. [electronic Resource]. 1971.
Cita MLA (9th ed.)Amendment of Title 35, United States Code. April 20, 1971. -- Ordered to Be Printed. [electronic Resource]. 1971.
Atenció: Aquestes cites poden no estar 100% correctes.