توثيق جمعية علم النفس الأمريكية APA (الطبعة السابعة)
Callus, A. (2017). Being friends means helping each other, making coffee for each other: Reciprocity in the friendships of people with intellectual disability.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)
Callus, A.M. Being Friends Means Helping Each Other, Making Coffee for Each Other: Reciprocity in the Friendships of People with Intellectual Disability. 2017.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)
Callus, A.M. Being Friends Means Helping Each Other, Making Coffee for Each Other: Reciprocity in the Friendships of People with Intellectual Disability. 2017.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.