Kaliteyevskaya E. R. , Leontiev D. A. : Formation of personality self-determination in adolescence 06'3 p.49
Kaliteyevskaya E. R. , Leontiev D. A. , Osin Ye. N. , Borodkina I. I. :
Meaning, adjustment and self-determination in adolescents
07'2 p.68