Gaya APA

, ., Yerima, B, P, K. (2005). Introduction to soil science : soils of the Tropics . Trafford Publishing, 2005: Trafford Publishing, 2005.

Gaya MLA

, ., Yerima, Bernard, P., K. "Introduction to soil science : soils of the Tropics". Trafford Publishing, 2005: Trafford Publishing, 2005, 2005. .