Technical change, diffusion, and productivity /

Chicago citation style
Campbell, Jeffrey R. Technical change, diffusion, and productivity /. 1993. Retrieved from the Digital Public Library of America, http://catalog.hathitrust.org/Record/102156505. (Accessed December 12, 2018.)
APA citation style
Campbell, Jeffrey R, (1993) Technical change, diffusion, and productivity /. Retrieved from the Digital Public Library of America, http://catalog.hathitrust.org/Record/102156505
MLA citation style
Campbell, Jeffrey R. Retrieved from the Digital Public Library of America <http://catalog.hathitrust.org/Record/102156505>.
Note: These citations are programmatically generated and may be incomplete.