Felsen, I. V. (1992). The influences of age, intelligence, gender, and socio-economic status on preceived competencies of gifted and talented children. Universität Hamburg.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Felsen, Irit V. The Influences of Age, Intelligence, Gender, and Socio-economic Status on Preceived Competencies of Gifted and Talented Children. Germany: Universität Hamburg, 1992.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Felsen, Irit V. The Influences of Age, Intelligence, Gender, and Socio-economic Status on Preceived Competencies of Gifted and Talented Children. Universität Hamburg, 1992.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.