Hong, Sung-wook (2008). Naming God in Korea: The Case of Protestant Christianity. OCMS. pp. [2]. ISBN1870345665.
Mason, David A. (1999). Spirit of the Mountains: Korea's San-Shin and Traditions of Mountain-worship. Hallim Publishing. pp. [3]. ISBN1565911075.
Kemerly, Tony; Steve Snyder (2013). Taekwondo Grappling Techniques: Hone Your Competitive Edge for Mixed Martial Arts. Tuttle Publishing. pp. [4]. ISBN1462909914.
G. John, Ikenberry; Chung-in Moon (2008). The United States and Northeast Asia: debates, issues, and new order Asia in world politics. Rowman & Littlefield. pp. 204 [5]. ISBN0742556395.