Cita APA (7a ed.)

Hippel, E. v. (1988). The sources of innovation. Oxford University Press.

Cita Chicago Style (17a ed.)

Hippel, Eric von. The Sources of Innovation. New York: Oxford University Press, 1988.

Cita MLA (9a ed.)

Hippel, Eric von. The Sources of Innovation. Oxford University Press, 1988.