Penn, R. (2011). It's all about the bike: The pursuit of happiness on two wheels. Bloomsbury.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रPenn, Rob. It's All About the Bike: The Pursuit of Happiness on Two Wheels. New York: Bloomsbury, 2011.
एमएलए (8वां संस्करण) प्रशस्ति पत्रPenn, Rob. It's All About the Bike: The Pursuit of Happiness on Two Wheels. Bloomsbury, 2011.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.