APA استشهاد

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

استشهاد بنمط شيكاغو

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

MLA استشهاد

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