Cita APA (7a ed.)
Ek, G. v., Henriet, J., Blade, S., & Singh, B. (1997). Quantitative assessment of traditional cropping systems in the Sudan savanna of northern Nigeria II. Management and productivity of major cropping systems.
Cita Chicago Style (17a ed.)
Ek, G.A. van, J. Henriet, S. Blade, y B. Singh. Quantitative Assessment of Traditional Cropping Systems in the Sudan Savanna of Northern Nigeria II. Management and Productivity of Major Cropping Systems. 1997.
Cita MLA (9a ed.)
Ek, G.A. van, et al. Quantitative Assessment of Traditional Cropping Systems in the Sudan Savanna of Northern Nigeria II. Management and Productivity of Major Cropping Systems. 1997.
Precaución: Estas citas no son 100% exactas.