Gaya APA

P.L.Woomer, , Swift, M. (1994). The Biological Manajement of Tropical Soil Fertility . Inggris: John Wiley & Son.

Gaya MLA

P.L.Woomer, , Swift, M.. The Biological Manajement of Tropical Soil Fertility. Inggris: John Wiley & Son, 1994. Text.