written by the participants in the National Student Symposium on the Education of the Gifted and Talented ; Mark L. Krueger, project director ; sponsored by the American Association for Gifted Children

Walker, 1978

 Buku Teks

American Psychological Association, 1991

 Buku Referensi

edited by Richard H. Egdahl and Diana Chapman Walsh

Springer-Verlag, 1978

 Buku Teks

Ray, Colin

UNESCO, 1979

 Buku Teks SO

edited by Monrad G. Paulsen

Columbia University Press, 1959

 Buku Teks