توثيق جمعية علم النفس الأمريكية APA (الطبعة السابعة)

Julia Unggai. (1995). Perceptions of close friendship among young adults from an attachment perspective. Department of Psychology, Lancaster University.

توثيق أسلوب شيكاغو (الطبعة السابعة عشر)

Julia Unggai. Perceptions of Close Friendship Among Young Adults from an Attachment Perspective. Lancaster: Department of Psychology, Lancaster University, 1995.

توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)

Julia Unggai. Perceptions of Close Friendship Among Young Adults from an Attachment Perspective. Department of Psychology, Lancaster University, 1995.