APA aipamena

Hippel,Eric Von. (1988). The sources of innovation. Oxford.

Chicago Style aipamena

Hippel,Eric Von. The Sources of Innovation. New York: Oxford, 1988.

MLA aipamena

Hippel,Eric Von. The Sources of Innovation. Oxford, 1988.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.