Creswell, John W. Research design Qualitative and Quantitative Approaches / John W. Creswell.-- -- Thousand Oaks London New Delhi: Sage Publication, 1994. 205 p. ; 21 cm. ISBN: 0803952554 Subjects--Topical Terms: Social sciences - research - methodology. Social science - statistical methods. Dewey Class. No.: Fil 300.72 C86 1994