545-563 p.
hal. 435-452
Gadjah Mada International Journal of Business Vol. 19 No. 1 January-April 2017 (Rak 6-L : Ekonomi)
Medical Journal of Indonesia Vol. 23 Issue 3 August 2014 (Rak 6-K : Kedokteran & Kesehatan )
Journal of Economic Research Vol. 20, No. 1 May 31, 2015 (Rak 6-L : Ekonomi)
hal. 491-505
hal. 408-413