APA
(1991). Focus on later Childhood early adolescence Vol.2&3 No.1-4 1989-1991. : .
Chicago
1991. Focus on later Childhood early adolescence Vol.2&3 No.1-4 1989-1991. : .
Harvard
(1991). Focus on later Childhood early adolescence Vol.2&3 No.1-4 1989-1991. : .
MLA
Focus on later Childhood early adolescence Vol.2&3 No.1-4 1989-1991. : . 1991.