1. Adom, D., & Hussein, E., (2018) Theoretical and Conceptual Framework: Mandatory Ingredients of Quality Research. International Journal of Scientific Research. 7(1), 438, 441.
2. Cheng, T. Y. (1991) Zheng, tradition and change (Doctoral dissertation, University of Maryland, Baltimore County).
3. Denvin, N., & Lincoln, Y. (2005) Introduction: Disciplining the Practice of Qualitative Research. The SAGE Handbook of Qualitative Research. 5, 3.
4. DeNora, T. (2000) Music in everyday life. Cambridge university press.
5. DeWoskin, K. J. (1982) A song for one or two: Music and the concept of art in early China (p. 76). Ann Arbor: Center for Chinese Studies, University of Michigan.