Παραπομπή APA

Valdes,Alberto. (1979). Economics and the design of small-farmer technology. Lowa State University Press.

Παραπομπή Chicago Style

Valdes,Alberto. Economics and the Design of Small-farmer Technology. IOWA: Lowa State University Press, 1979.

Παραπομπή MLA

Valdes,Alberto. Economics and the Design of Small-farmer Technology. Lowa State University Press, 1979.