Cita APA (7th ed.)

Foster, F. H., & Shook, R. L. (1993). Patents, Copyrights & trademarks (2nd ed.). Wiley.

Cita Chicago (17th ed.)

Foster, Frank H., i Robert L. Shook. Patents, Copyrights & Trademarks. 2nd ed. New York: Wiley, 1993.

Cita MLA (9th ed.)

Foster, Frank H., i Robert L. Shook. Patents, Copyrights & Trademarks. 2nd ed. Wiley, 1993.