Ardi, D., and E. Raharjo. “The Learning Method Of Gita Buana Soedirman’s Choir Of Jendral Soedirman University Purwokerto”. Jurnal Seni Musik, Vol. 10, no. 2, Dec. 2021, pp. 176-83, doi:10.15294/jsm.v10i2.42682.