Ng, P. Y. (2011). Household willingness to pay for mandated kerbside recycling programme in Hulu Langat, Malaysia.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNg, Phuay Ying. Household Willingness to Pay for Mandated Kerbside Recycling Programme in Hulu Langat, Malaysia. 2011.
एमएलए (9वां संस्करण) प्रशस्ति पत्रNg, Phuay Ying. Household Willingness to Pay for Mandated Kerbside Recycling Programme in Hulu Langat, Malaysia. 2011.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.