Carlson, R. (2005). Easier than you think --because life doesn't have to be so hard: The small changes that add up to a world of difference. HarperSanFrancisco.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Carlson, Richard. Easier than You Think --because Life Doesn't Have to Be so Hard: The Small Changes That Add Up to a World of Difference. [San Francisco]: HarperSanFrancisco, 2005.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Carlson, Richard. Easier than You Think --because Life Doesn't Have to Be so Hard: The Small Changes That Add Up to a World of Difference. HarperSanFrancisco, 2005.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.