Felsen, I. V. (1992). The influences of age, intelligence, gender, and socio-economic status on preceived competencies of gifted and talented children. Universität Hamburg.
Chicago-referens (17:e uppl.)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.
MLA-referens (8:e uppl.)Felsen, Irit V. The Influences of Age, Intelligence, Gender, and Socio-economic Status on Preceived Competencies of Gifted and Talented Children. Universität Hamburg, 1992.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.