Gaya APA

Klees, M, E., Leithe, D. (1957). The Coal Deposit From Bukit Asam In South - East Sumatra. "Wedexro" Vol. 3, Fasc. 2, 1957 . Bandung: Direktort Batubara.

Gaya MLA

Klees, Min., Eng.., Leithe, Dr.. "The Coal Deposit From Bukit Asam In South - East Sumatra. "Wedexro" Vol. 3, Fasc. 2, 1957". Bandung: Direktort Batubara, 1957. Batubara.