Yigit, Pervin. “John Brown As an Independent Character from Warburton Circle / Warburton Camiası’ndan Bağımsız Bir Karakter Olarak John Brown”. Journal of History Culture and Art Research 6, no. 4 (September 30, 2017): 55-68. Accessed December 10, 2022. http://kutaksam.karabuk.edu.tr/index.php/ilk/article/view/1037.