Levinson, D. T. (2010). Everyone helps, everyone wins: How absolutely anyone can pitch in, help out, give back, and make the world a better place. Hudson Street Press.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Levinson, David T. Everyone Helps, Everyone Wins: How Absolutely Anyone Can Pitch in, Help Out, Give Back, and Make the World a Better Place. New York: Hudson Street Press, 2010.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Levinson, David T. Everyone Helps, Everyone Wins: How Absolutely Anyone Can Pitch in, Help Out, Give Back, and Make the World a Better Place. Hudson Street Press, 2010.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.