Pakes, A. (1980). Patents and R & D at the firm level: A first look.
Chicago Style (17th ed.) CitationPakes, Ariel. Patents and R & D at the Firm Level: A First Look. 1980.
MLA (9th ed.) CitationPakes, Ariel. Patents and R & D at the Firm Level: A First Look. 1980.
Warning: These citations may not always be 100% accurate.