APA (7 वां संस्करण) प्रशस्ति पत्र
Wedgwood, A., & Sansom, K. Willingness-to-pay Surveys: A Streamlined Approach : Guidance Notes for Small Town Water Services. Loughborough University, Water, Engineering and Development Centre.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र
Wedgwood, Alison, और Kevin Sansom. Willingness-to-pay Surveys: A Streamlined Approach : Guidance Notes for Small Town Water Services. Leicestershire, Inglaterra: Loughborough University, Water, Engineering and Development Centre.
एमएलए (9वां संस्करण) प्रशस्ति पत्र
Wedgwood, Alison, और Kevin Sansom. Willingness-to-pay Surveys: A Streamlined Approach : Guidance Notes for Small Town Water Services. Loughborough University, Water, Engineering and Development Centre.
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