Não informado. (1961). Petroleum Intelligence Weekly. Petroleum Intellegence Weekly.
Cita Chicago Style (17a ed.)Não informado. Petroleum Intelligence Weekly. New York: Petroleum Intellegence Weekly, 1961.
Cita MLA (8a ed.)Não informado. Petroleum Intelligence Weekly. Petroleum Intellegence Weekly, 1961.
Precaución: Estas citas no son 100% exactas.