Lua APA (7ú heag.)

Não informado. (1975). Improved oil-recovery field reports. Society of Petroleum Engineers.

Lua i Stíl Chicago (17ú heag.)

Não informado. Improved Oil-recovery Field Reports. Dallas, Tex: Society of Petroleum Engineers, 1975.

Lua MLA (8ú heag.)

Não informado. Improved Oil-recovery Field Reports. Society of Petroleum Engineers, 1975.

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