APA (7th ed.) Citation

Mueller, D. C., & Tilton, J. E. (1969). Research and development costs as a barrier to entry. [s.n.].

Chicago Style (17th ed.) Citation

Mueller, Dennis C., and John E. Tilton. Research and Development Costs as a Barrier to Entry. [S.l.]: [s.n.], 1969.

MLA (9th ed.) Citation

Mueller, Dennis C., and John E. Tilton. Research and Development Costs as a Barrier to Entry. [s.n.], 1969.