APA

Suresh Kumar, University of Delhi. Faculty of Arts. Department of Psychology & University of Delhi. Faculty of Arts. Department of Psychology. (1976). Effectiveness of digit-sum method (programmed instruction) among a group of middle school students in relation to level of achivement. : .

Chicago

Suresh Kumar, University of Delhi. Faculty of Arts. Department of Psychology and University of Delhi. Faculty of Arts. Department of Psychology. 1976. Effectiveness of digit-sum method (programmed instruction) among a group of middle school students in relation to level of achivement. : .

Harvard

Suresh Kumar, University of Delhi. Faculty of Arts. Department of Psychology and University of Delhi. Faculty of Arts. Department of Psychology. (1976). Effectiveness of digit-sum method (programmed instruction) among a group of middle school students in relation to level of achivement. : .

MLA

Suresh Kumar, University of Delhi. Faculty of Arts. Department of Psychology and University of Delhi. Faculty of Arts. Department of Psychology. Effectiveness of digit-sum method (programmed instruction) among a group of middle school students in relation to level of achivement. : . 1976.