Παραπομπή σε μορφή APA (7η εκδ.)

Harhoff, D., Orlin, J. B., & Hippel, E. v. (1991). Strategic spillover production, vertival organization, and incentives for research and development.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Harhoff, Dietmar, James B. Orlin, και Eric von Hippel. Strategic Spillover Production, Vertival Organization, and Incentives for Research and Development. 1991.

Παραπομπή σε μορφή MLA (9th εκδ.)

Harhoff, Dietmar, et al. Strategic Spillover Production, Vertival Organization, and Incentives for Research and Development. 1991.