Powell, G. R., Groves, S., & Dimos, J. (2011). ROI of $ocial media: How to improve the return on your social marketing investment. John Wiley & Sons (Asia).
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रPowell, Guy R., Steven Groves, और Jerry Dimos. ROI of $ocial Media: How to Improve the Return on Your Social Marketing Investment. Singapore: John Wiley & Sons (Asia), 2011.
एमएलए (9वां संस्करण) प्रशस्ति पत्रPowell, Guy R., et al. ROI of $ocial Media: How to Improve the Return on Your Social Marketing Investment. John Wiley & Sons (Asia), 2011.
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