Galinsky, A. D., & Schweitzer, M. (2015). Friend and foe: When to cooperate, when to compete, and how to succeed at both (First edition.). Crown Business.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Galinsky, Adam D., و Maurice Schweitzer. Friend and Foe: When to Cooperate, When to Compete, and How to Succeed at Both. First edition. New York: Crown Business, 2015.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Galinsky, Adam D., و Maurice Schweitzer. Friend and Foe: When to Cooperate, When to Compete, and How to Succeed at Both. First edition. Crown Business, 2015.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.