APA
Ray Shilu, University of Delhi. Faculty of Social Sciences. Department of Economics & University of Delhi. Faculty of Social Sciences. Department of Economics. (1992). Inter firm and inter temporal variation in technic. Delhi: University of Delhi India.
Chicago
Ray Shilu, University of Delhi. Faculty of Social Sciences. Department of Economics and University of Delhi. Faculty of Social Sciences. Department of Economics. 1992. Inter firm and inter temporal variation in technic. Delhi: University of Delhi India.
Harvard
Ray Shilu, University of Delhi. Faculty of Social Sciences. Department of Economics and University of Delhi. Faculty of Social Sciences. Department of Economics. (1992). Inter firm and inter temporal variation in technic. Delhi: University of Delhi India.
MLA
Ray Shilu, University of Delhi. Faculty of Social Sciences. Department of Economics and University of Delhi. Faculty of Social Sciences. Department of Economics. Inter firm and inter temporal variation in technic. Delhi: University of Delhi India. 1992.