APA

Roll No. 17, University of Delhi. Faculty of Education. Department of Education & University of Delhi. Faculty of Education. Department of Education. (1971). Investigation into the changes in the problems and interest pattern of the adolescents with (I) grade (II) sex (III) economic status of the family. : .

Chicago

Roll No. 17, University of Delhi. Faculty of Education. Department of Education and University of Delhi. Faculty of Education. Department of Education. 1971. Investigation into the changes in the problems and interest pattern of the adolescents with (I) grade (II) sex (III) economic status of the family. : .

Harvard

Roll No. 17, University of Delhi. Faculty of Education. Department of Education and University of Delhi. Faculty of Education. Department of Education. (1971). Investigation into the changes in the problems and interest pattern of the adolescents with (I) grade (II) sex (III) economic status of the family. : .

MLA

Roll No. 17, University of Delhi. Faculty of Education. Department of Education and University of Delhi. Faculty of Education. Department of Education. Investigation into the changes in the problems and interest pattern of the adolescents with (I) grade (II) sex (III) economic status of the family. : . 1971.