Παραπομπή APA

Berle, A. K., & Camp, L. S. d. (1959). Inventions, patents, and their management. D. Van nostrand company.

Παραπομπή Chicago Style

Berle, Alf K., και L. Sprague de Camp. Inventions, Patents, and Their Management. London: D. Van nostrand company, 1959.

Παραπομπή MLA

Berle, Alf K., και L. Sprague de Camp. Inventions, Patents, and Their Management. D. Van nostrand company, 1959.