Παραπομπή σε μορφή APA (7η εκδ.)

Petruk, W. (1994). Process mineralogy XII: Applications to environment, precious metals, mineral benefication, pyrometallurgy, coal and refractories. Minerals, Metals & Materials Society (TMS).

Παραπομπή σε μορφή Chicago (17η εκδ.)

Petruk, William. Process Mineralogy XII: Applications to Environment, Precious Metals, Mineral Benefication, Pyrometallurgy, Coal and Refractories. Warrendale, PE: Minerals, Metals & Materials Society (TMS), 1994.

Παραπομπή σε μορφή MLA (8th εκδ.)

Petruk, William. Process Mineralogy XII: Applications to Environment, Precious Metals, Mineral Benefication, Pyrometallurgy, Coal and Refractories. Minerals, Metals & Materials Society (TMS), 1994.