Cita APA (7th ed.)

Roling, N. G. (1988). Extension science: Information systems in agricultural development. Cambridge University Press.

Cita Chicago (17th ed.)

Roling, Niels G. Extension Science: Information Systems in Agricultural Development. Cambridge [England]: Cambridge University Press, 1988.

Cita MLA (9th ed.)

Roling, Niels G. Extension Science: Information Systems in Agricultural Development. Cambridge University Press, 1988.