Butterfield, J. (2018). Soft Skills for Everyone. Cengage Learning.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रButterfield, Jeff. Soft Skills for Everyone. Delhi: Cengage Learning, 2018.
एमएलए (9वां संस्करण) प्रशस्ति पत्रButterfield, Jeff. Soft Skills for Everyone. Cengage Learning, 2018.
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