Cohen, W. M., & Levinthal, D. A. (1990). The Implications of Spillovers for R&D Investment and Welfare: A New Perspective. In A. Link & K. Smith (Eds.), The Factors Affecting Technological Change (Vol. 5, pp. 29–45). Greenwich, Conn: JAI Press.

Cohen, W. M., and D. A. Levinthal. “The Implications of Spillovers for R&D Investment and Welfare: A New Perspective.” In The Factors Affecting Technological Change, edited by A. Link and K. Smith, 5:29–45. Greenwich, Conn: JAI Press, 1990.

Cohen WM, Levinthal DA. The Implications of Spillovers for R&D Investment and Welfare: A New Perspective. In: Link A, Smith K, editors. The Factors Affecting Technological Change. Greenwich, Conn: JAI Press; 1990. p. 29–45.

Cohen, W. M., and D. A. Levinthal. “The Implications of Spillovers for R&D Investment and Welfare: A New Perspective.” The Factors Affecting Technological Change, edited by A. Link and K. Smith, vol. 5, JAI Press, 1990, pp. 29–45.

Cohen WM, Levinthal DA. The Implications of Spillovers for R&D Investment and Welfare: A New Perspective. In: Link A, Smith K, editors. The Factors Affecting Technological Change. Greenwich, Conn: JAI Press; 1990. p. 29–45.