APA (7 वां संस्करण) प्रशस्ति पत्र

Norwahida Binti Zakaria. (2016). The effect of recycling to the properties of different brands of polyethylene terephthalate (pet) bottle. School of Material Engineering, University Malaysia Perlis.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Norwahida Binti Zakaria. The Effect of Recycling to the Properties of Different Brands of Polyethylene Terephthalate (pet) Bottle. Perlis, Malaysia: School of Material Engineering, University Malaysia Perlis, 2016.

एमएलए (8वां संस्करण) प्रशस्ति पत्र

Norwahida Binti Zakaria. The Effect of Recycling to the Properties of Different Brands of Polyethylene Terephthalate (pet) Bottle. School of Material Engineering, University Malaysia Perlis, 2016.

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