APA (7th ed.) Citation

Acs, Z. J., Audretsch, D. B., Acs, Z. J., & Feldman, M. P. (1992). R & D spillovers and innovative activity. WZB.

Chicago Style (17th ed.) Citation

Acs, Zoltán J., David B. Audretsch, Zoltán J. Acs, and Maryann P. Feldman. R & D Spillovers and Innovative Activity. Berlin: WZB, 1992.

MLA (9th ed.) Citation

Acs, Zoltán J., et al. R & D Spillovers and Innovative Activity. WZB, 1992.