Gaya APA
Jones, C, R. (1970).
The Geology and Mineral Resources of The Grik Area,Upper Perak .
West Malaysia:
Geological Survey Headquarters.
Gaya MLA
Jones, C,, R.
"The Geology and Mineral Resources of The Grik Area,Upper Perak".
West Malaysia:
Geological Survey Headquarters,
1970.
Text.