APA

Sehgal R. L, University of Delhi. Faculty of Arts. Department of Library and Information Science & University of Delhi. Faculty of Arts. Department of Library and Information Science. (1981). Evaluation of text book collection in Economics and Sociology at post graduate level in Delhi School of Economics Library. : .

Chicago

Sehgal R. L, University of Delhi. Faculty of Arts. Department of Library and Information Science and University of Delhi. Faculty of Arts. Department of Library and Information Science. 1981. Evaluation of text book collection in Economics and Sociology at post graduate level in Delhi School of Economics Library. : .

Harvard

Sehgal R. L, University of Delhi. Faculty of Arts. Department of Library and Information Science and University of Delhi. Faculty of Arts. Department of Library and Information Science. (1981). Evaluation of text book collection in Economics and Sociology at post graduate level in Delhi School of Economics Library. : .

MLA

Sehgal R. L, University of Delhi. Faculty of Arts. Department of Library and Information Science and University of Delhi. Faculty of Arts. Department of Library and Information Science. Evaluation of text book collection in Economics and Sociology at post graduate level in Delhi School of Economics Library. : . 1981.