Gaya APA
E-1, A, C. (1992).
Suggested Methods for Analysis of Metals, Ores, and Related Materials 9th Edition .
Ann Arbor:
ASTM.
Gaya MLA
E-1, ASTM, Committee.
"Suggested Methods for Analysis of Metals, Ores, and Related Materials 9th Edition".
Ann Arbor:
ASTM,
1992.
Text.