Gaya APA
Zulkarnain, . (1990).
Report Of ITIT Project : The Study On Utilization Of Natural Zeolite .
Tohoku:
goverment industrial research institute.
Gaya MLA
Zulkarnain, .
"Report Of ITIT Project : The Study On Utilization Of Natural Zeolite".
Tohoku:
goverment industrial research institute,
1990.
Text.