Cita APA

Holt, J. E., & Schoorl, D. (1985). The role of innovation, servicing and obsolescence in agricultural extension. Inglaterra: Elsevier.

Citación estilo Chicago

Holt, J. E., and D. Schoorl. The Role of Innovation, Servicing and Obsolescence in Agricultural Extension. Inglaterra: Elsevier, 1985.

Cita MLA

Holt, J. E., and D. Schoorl. The Role of Innovation, Servicing and Obsolescence in Agricultural Extension. Inglaterra: Elsevier, 1985.