Lua APA (7ú heag.)

Não informado. (2017). Petroleum Engineer for Management. Petroleum Engineer Publishing.

Lua i Stíl Chicago (17ú heag.)

Não informado. Petroleum Engineer for Management. Dallas, Tex: Petroleum Engineer Publishing, 2017.

Lua MLA (8ú heag.)

Não informado. Petroleum Engineer for Management. Petroleum Engineer Publishing, 2017.

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