Hester, T. (2019). Work optional: Retire early the non-penny-pinching way (First edition.). Hachette Books.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHester, Tanja. Work Optional: Retire Early the Non-penny-pinching Way. First edition. New York: Hachette Books, 2019.
एमएलए (8वां संस्करण) प्रशस्ति पत्रHester, Tanja. Work Optional: Retire Early the Non-penny-pinching Way. First edition. Hachette Books, 2019.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.