Sincero, J. (2020). Badass habits: Cultivate the awareness, boundaries, and daily upgrades you need to make them stick. Penguin Life.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSincero, Jen. Badass Habits: Cultivate the Awareness, Boundaries, and Daily Upgrades You Need to Make Them Stick. [New York]: Penguin Life, 2020.
एमएलए (8वां संस्करण) प्रशस्ति पत्रSincero, Jen. Badass Habits: Cultivate the Awareness, Boundaries, and Daily Upgrades You Need to Make Them Stick. Penguin Life, 2020.
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