Cita APA

Hettel, G. (1989). Wheat production advances in South America's colossus: The gains from 20 years of Brazilian/CIMMYT research collaboration.

Citación estilo Chicago

Hettel, G.P. Wheat Production Advances in South America's Colossus: The Gains From 20 Years of Brazilian/CIMMYT Research Collaboration. 1989.

Cita MLA

Hettel, G.P. Wheat Production Advances in South America's Colossus: The Gains From 20 Years of Brazilian/CIMMYT Research Collaboration. 1989.