Cita APA

Timothy, D. H., Dowswell, C. R., & Harvey, P. H. (1988). Development and spread of improved maize varieties and hybrids in developing countries. Washington: AID.

Citación estilo Chicago

Timothy, David H., Christopher R. Dowswell, y Paul H. Harvey. Development and Spread of Improved Maize Varieties and Hybrids in Developing Countries. Washington: AID, 1988.

Cita MLA

Timothy, David H., Christopher R. Dowswell, y Paul H. Harvey. Development and Spread of Improved Maize Varieties and Hybrids in Developing Countries. Washington: AID, 1988.