Punch, Keith. Introduction to social research : quantitative and qualitative approaches / Keith F. Punch. - 2nd ed. - London ; Thousand Oaks, Calif. : SAGE, 2005. - xvi, 320 p. : ill. ; 25 cm. Includes bibliographical references (p. [296]-308) and index. ISBN: 0761944176 Subjects--Topical Terms: Social sciences--Research. Dewey Class. No.: 300.72 PUN