Gaya APA
Sellin, D, F., Birch, J, W. (1981).
Psychoeducational development of gifted and talented learners .
London:
Aspen Publication.
Gaya MLA
Sellin, Donald, F.., Birch, Jack, W..
"Psychoeducational development of gifted and talented learners".
London:
Aspen Publication,
1981.
Text.