Gaya APA

Collin, E. et al (1990). Organic-Matter Management and Tillage In Humid And Subhumid Africa . Thailand: Food And Agriculture Organization Of The United Nations.

Gaya MLA

Collin, Elliot. et al. "Organic-Matter Management and Tillage In Humid And Subhumid Africa". Thailand: Food And Agriculture Organization Of The United Nations, 1990. Text.