Gaya APA

Mansfield, E., , . (1968). Industrial research and technological innovation An Economimetric ì Analysis . New York: New York: W.W. Norton &Company; 1968.

Gaya MLA

Mansfield, Edwin., , . "Industrial research and technological innovation An Economimetric ì Analysis". New York: New York: W.W. Norton &Company; 1968, 1968. Text.