Gaya APA
Jenkner, D, P, A. (1959).
Coking Tests According to Tasmaja/Baum Lum Coking and Production of Single-Process Briquitted coke With Sigihan and Loa Pari Coal .
Bandung:
Pusat Sumber Daya Geologi.
Gaya MLA
Jenkner, Dr., Phil., A,.
"Coking Tests According to Tasmaja/Baum Lum Coking and Production of Single-Process Briquitted coke With Sigihan and Loa Pari Coal".
Bandung:
Pusat Sumber Daya Geologi,
1959.
Batubara.