APA-Zitierstil (7. Ausg.)

Ejercito, T. A., & Lewis, H. R. (1967). Washability characteristics of some Philippine coals. [Bureau of Mines].

Chicago-Zitierstil (17. Ausg.)

Ejercito, Telesforo A., und Helen R. Lewis. Washability Characteristics of Some Philippine Coals. Manila: [Bureau of Mines], 1967.

MLA-Zitierstil (9. Ausg.)

Ejercito, Telesforo A., und Helen R. Lewis. Washability Characteristics of Some Philippine Coals. [Bureau of Mines], 1967.