Agarwal, Chetan Encyclopaedia of research methodology. - New Delhi : Commonwealth Publishers, 2011. - v,265p. - Volume 5: Research methodology in sociology . ISBN: 9788131103432 10000 Source: 1742, 14/02/2012, Kiran Book Service Textual Subjects--Topical Terms: Hindi Dewey Class. No.: Σ:fk Q1.5 RR