Stobbs, G. A. (2002). Business method patents. Aspen publishers.
Chicago Style aipamenaStobbs, Gregory A. Business Method Patents. New York: Aspen publishers, 2002.
MLA aipamenaStobbs, Gregory A. Business Method Patents. Aspen publishers, 2002.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.