Gaya APA
Date, A, R. (1978).
Preparation Of Trace Element Reference Materials by a Coprecipitated Gel Technique .
Bandung:
Pusat Sumber Daya Geologi.
Gaya MLA
Date, Alan, R..
"Preparation Of Trace Element Reference Materials by a Coprecipitated Gel Technique".
Bandung:
Pusat Sumber Daya Geologi,
1978.
Umum.