Williams, S. W. (2021). Natural beauty from the outside in (First edition.). Stackpole Books.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWilliams, Sojourner Walker. Natural Beauty from the Outside in. First edition. Guilford, Connecticut: Stackpole Books, 2021.
एमएलए (8वां संस्करण) प्रशस्ति पत्रWilliams, Sojourner Walker. Natural Beauty from the Outside in. First edition. Stackpole Books, 2021.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.