Gaya APA
AARD, . (1992).
ACID SULPHATE SOILS IN THE HUMID TROPICS .
INDONESIA:
AGENCY FOR AGRIULURAL RESEACH AND DEELOPMENT.
Gaya MLA
AARD, .
"ACID SULPHATE SOILS IN THE HUMID TROPICS".
INDONESIA:
AGENCY FOR AGRIULURAL RESEACH AND DEELOPMENT,
1992.
Text.