Gaya APA

Janssen,B.H, ., Wienk,J.F, . (1990). Mechanized Annual Cropping On Low Fertility Acid Soils In The Humid Tropics A Case Study of The Zanderij Soils In Suriname . Netherland: Wageningen Agricultural University.

Gaya MLA

Janssen,B.H, ., Wienk,J.F, . "Mechanized Annual Cropping On Low Fertility Acid Soils In The Humid Tropics A Case Study of The Zanderij Soils In Suriname". Netherland: Wageningen Agricultural University, 1990. Text.