Jesica Uli Panggabean, Bela Firmantoyo, dan Darmeli Nasution, “An Operational Design Of Doppler Vhf Omni Directional Range (DVOR) Based On Virtual Reality As A Learning Media At Medan Aviation Polytechnic”, Scientia, vol. 13, no. 04, hlm. 1302-1308, Sep 2024.