Darma, I Ketut, 		Karma, I Gede Made, AND 		Santiana, I Made Anom.
"Validity and Practicality Test of Applied Mathematics Digital Teaching Materials for Blended Learning for Polytechnic Students" <em>Soshum: Jurnal Sosial dan Humaniora</em> [Online], Volume 11 Number 1 (31 March 2021)