Gaya APA

Keller, G, V. (1968). Quarterly of the Colorado school of mines : electrical prospecting for oil (1968). : USA : Corolado School of Mines,.

Gaya MLA

Keller, George, V. "Quarterly of the Colorado school of mines : electrical prospecting for oil". 1968 : USA : Corolado School of Mines,, 1968. Text.