Gaya APA
Klepper, O. et al (1987).
Acid Sulphate Soils in The Humid Tropics: Ecological Aspects of Their Environment .
The Netherlands:
AARD & LAWOO.
Gaya MLA
Klepper, O.. et al.
"Acid Sulphate Soils in The Humid Tropics: Ecological Aspects of Their Environment".
The Netherlands:
AARD & LAWOO,
1987.
Text.