TY - BOOK T1 - Educational research quantitative, qualitative, and mixed approaches A1 - Johnson, Burke A2 - Christensen, Larry B. 1941- LA - English PP - Thousand Oaks, Calif. PB - SAGE Publications YR - 2012 ED - 4th ed. UL - https://tuklas.up.edu.ph/Record/UP-8027390931312409569 OP - 621 CN - LB 1028 J59 2012 SN - 9781412978286 (cloth) KW - Education : Research. ER -