Cita APA (7a ed.)

Kirkham, V. R. D. (1935). Natural gas in Washington, Idaho, eastern Oregon, and northern Utah. American Society of Petroleum Geologists.

Cita Chicago Style (17a ed.)

Kirkham, Virgil R. D. Natural Gas in Washington, Idaho, Eastern Oregon, and Northern Utah. [n.p.]: American Society of Petroleum Geologists, 1935.

Cita MLA (8a ed.)

Kirkham, Virgil R. D. Natural Gas in Washington, Idaho, Eastern Oregon, and Northern Utah. American Society of Petroleum Geologists, 1935.

Precaución: Estas citas no son 100% exactas.