Cita APA (7a ed.)

Independent Petroleum Association of America. (1971). Petroleum independent. Independent Petroleum Association of America].

Cita Chicago Style (17a ed.)

Independent Petroleum Association of America. Petroleum Independent. [Tulsa, Okla.: Independent Petroleum Association of America], 1971.

Cita MLA (8a ed.)

Independent Petroleum Association of America. Petroleum Independent. Independent Petroleum Association of America], 1971.