APA (7th ed.) Citation

Jaffe, A. B., Trajtenberg, M., & Henderson, R. (1992). Geographic localization of knowledge spillovers as evidenced by patent citations. NBER.

Chicago Style (17th ed.) Citation

Jaffe, Adam B., Manuel Trajtenberg, and Rebecca Henderson. Geographic Localization of Knowledge Spillovers as Evidenced by Patent Citations. Cambridge, Mass: NBER, 1992.

MLA (9th ed.) Citation

Jaffe, Adam B., et al. Geographic Localization of Knowledge Spillovers as Evidenced by Patent Citations. NBER, 1992.