APA
Roll No. 19, University of Delhi. Faculty of Education. Department of Education & University of Delhi. Faculty of Education. Department of Education. (1972). Study of the analysis of teaching roles of physical-science teachers. : .
Chicago
Roll No. 19, University of Delhi. Faculty of Education. Department of Education and University of Delhi. Faculty of Education. Department of Education. 1972. Study of the analysis of teaching roles of physical-science teachers. : .
Harvard
Roll No. 19, University of Delhi. Faculty of Education. Department of Education and University of Delhi. Faculty of Education. Department of Education. (1972). Study of the analysis of teaching roles of physical-science teachers. : .
MLA
Roll No. 19, University of Delhi. Faculty of Education. Department of Education and University of Delhi. Faculty of Education. Department of Education. Study of the analysis of teaching roles of physical-science teachers. : . 1972.