Gaya APA

Jenkner, D, P, A. (1959). Preliminary Examination Of The Coal Samples From Se-Kalimantan And The Mahakam District . Bandung: Pusat Sumber Daya Geologi.

Gaya MLA

Jenkner, Dr., Phil, A. "Preliminary Examination Of The Coal Samples From Se-Kalimantan And The Mahakam District". Bandung: Pusat Sumber Daya Geologi, 1959. Batubara.