Introduction to social research :
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.
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.