Van Gelder, S. (2014). Sustainable happiness: Live simply, live well, make a difference (First edition.). BK, Berrett-Koehler Publishers, Inc., San Francisco, a BK Life Book.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रVan Gelder, Sarah. Sustainable Happiness: Live Simply, Live Well, Make a Difference. First edition. San Francisco: BK, Berrett-Koehler Publishers, Inc., San Francisco, a BK Life Book, 2014.
एमएलए (8वां संस्करण) प्रशस्ति पत्रVan Gelder, Sarah. Sustainable Happiness: Live Simply, Live Well, Make a Difference. First edition. BK, Berrett-Koehler Publishers, Inc., San Francisco, a BK Life Book, 2014.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.