SPENCE, W. P. (2011). Construction materials, methods, and techniques: Building for a sustainable future third edition. Cengage Lerning.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSPENCE, William P. Construction Materials, Methods, and Techniques: Building for a Sustainable Future Third Edition. Cengage Lerning, 2011.
एमएलए (8वां संस्करण) प्रशस्ति पत्रSPENCE, William P. Construction Materials, Methods, and Techniques: Building for a Sustainable Future Third Edition. Cengage Lerning, 2011.
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