ÜNAL KESTANE, Serpil. “The Effects of the Black Swan Pandemic on Turkısh Companies and Their Previsions for Face - to - Face Sales in the Near Future”. International Journal of Social, Political and Economic Research, vol. 8, no. 1, Apr. 2021, pp. 89-110, doi:10.46291/IJOSPERvol8iss1pp89-110.