Halstead, R. R. (1996). Protecting intellectual property: Understanding and using trade marks, patents, designs and copyright in business (2nd ed.). ICSA Pub.
Παραπομπή σε μορφή Chicago (17η εκδ.)Halstead, Richard R. Protecting Intellectual Property: Understanding and Using Trade Marks, Patents, Designs and Copyright in Business. 2nd ed. Hemel Hempstead [Eng.]: ICSA Pub, 1996.
Παραπομπή σε μορφή MLA (9th εκδ.)Halstead, Richard R. Protecting Intellectual Property: Understanding and Using Trade Marks, Patents, Designs and Copyright in Business. 2nd ed. ICSA Pub, 1996.
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