Timberman, D. G. (1991). A changeless land: Continuity and change in Philippine politics. Bookmark ISEAS.
芝加哥风格引文Timberman, David G. A Changeless Land: Continuity and Change in Philippine Politics. Makati, Singapore: Bookmark ISEAS, 1991.
MLA引文Timberman, David G. A Changeless Land: Continuity and Change in Philippine Politics. Bookmark ISEAS, 1991.
警告：这些引文格式不一定是100％准确.