Gaya APA

Tashakkori, A., Teddlie, C. (1998). Mixed methodology: combining qualitative and quantitative approaches . Thousand Oaks, California: Sage Publication, Inc..

Gaya MLA

Tashakkori, Abbas., Teddlie, Charles. "Mixed methodology: combining qualitative and quantitative approaches". Thousand Oaks, California: Sage Publication, Inc., 1998. Text.