Dyfyniad APA

Penn, W., & Titow, W. V. L. (1971). PVC Technology (3rd ed.). Applied Science Publishers.

Dyfyniad Arddull Chicago

Penn, W.S, and W V Lenham Titow. PVC Technology. 3rd ed. London: Applied Science Publishers, 1971.

Dyfyniad MLA

Penn, W.S, and W V Lenham Titow. PVC Technology. 3rd ed. Applied Science Publishers, 1971.

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