Guillebeau, C. (2017). Side hustle: From idea to income in 27 days.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रGuillebeau, Chris. Side Hustle: From Idea to Income in 27 Days. 2017.
एमएलए (8वां संस्करण) प्रशस्ति पत्रGuillebeau, Chris. Side Hustle: From Idea to Income in 27 Days. 2017.
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