Mat Yusoff, S., A. F. Mohd Marzaini, M. H. Hassan, and N. Zakaria. “Investigating the Roles of Pedagogical Content Knowledge in Music Education: : A Systematic Literature Review”. Malaysian Journal of Music, vol. 12, no. 2, Dec. 2023, pp. 95-114, doi:10.37134//mjm.vol12.2.6.2023.