Cita APA (7a ed.)

Arundel, A., & Kabla, I. (1998). What percentage of innovations are patented?: Empirical estimates for European firms. [s.n.].

Cita Chicago Style (17a ed.)

Arundel, Anthony, y Isabelle Kabla. What Percentage of Innovations Are Patented?: Empirical Estimates for European Firms. [S.l.]: [s.n.], 1998.

Cita MLA (9a ed.)

Arundel, Anthony, y Isabelle Kabla. What Percentage of Innovations Are Patented?: Empirical Estimates for European Firms. [s.n.], 1998.