Tugendhat,Christopher. (1969). Oil: The Biggest business. Londra: Eyre & Spottiswoode.
Chicago Stili AlıntıTugendhat,Christopher. Oil: The Biggest Business. Londra: Eyre & Spottiswoode, 1969.
MLA AlıntıTugendhat,Christopher. Oil: The Biggest Business. Londra: Eyre & Spottiswoode, 1969.
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