Dyfyniad APA

Wadden, A. L. (1968). Chemical From Petroleum, an Introductory Survey. English Language Book Society.

Dyfyniad Arddull Chicago

Wadden, A. Lawrence. Chemical From Petroleum, an Introductory Survey. London: English Language Book Society, 1968.

Dyfyniad MLA

Wadden, A. Lawrence. Chemical From Petroleum, an Introductory Survey. English Language Book Society, 1968.

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