This paper presents an Augmented Reality (AR) system for physical text documents that enable users to click a document. In the system, we track the relative pose between a camera and a document to overlay some virtual contents on the document continuously. In addition, we compute the trajectory of a fingertip based on skin color detection for clicking interaction. By merging a document tracking and an interaction technique, we have developed a novel tangible document system. As an application, we develop an AR dictionary system that overlays the meaning and explanation of words by clicking on a document. In the experiment part, we present the accuracy of the clicking interaction and the robustness of our document tracking method against the occlusion.