Gaya APA
KLUTE, A. (1986).
METHODS OF SOIL ANALYSIS PART 1 : PHYSICAL AND MINERALOGICAL METHODS SECOND EDITION .
AMERIKA SERIKAT:
MADISON.
Gaya MLA
KLUTE, ARNOLD.
"METHODS OF SOIL ANALYSIS PART 1 : PHYSICAL AND MINERALOGICAL METHODS SECOND EDITION".
AMERIKA SERIKAT:
MADISON,
1986.
Text.