Badger, J., & Reddy, P. (2009). The effects of birth order on personality traits and feelings of academic sibling rivalry. British Psychological Society.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Badger, JR, و P. Reddy. The Effects of Birth Order on Personality Traits and Feelings of Academic Sibling Rivalry. British Psychological Society, 2009.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Badger, JR, و P. Reddy. The Effects of Birth Order on Personality Traits and Feelings of Academic Sibling Rivalry. British Psychological Society, 2009.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.