YÜCENURŞEN, Mehmet. 2019. “REKABET AVANTAJI VE MALİYET MİNİMİZASYON ARACI OLARAK DOĞRUDAN PAZARLAMA”. International Journal of Social and Humanities Sciences Research (JSHSR) 6 (46):3942-51. https://doi.org/10.26450/jshsr.1364.