Guthrie, G. M. (1968). Six perspectives on the Philippines. Bookmark.
芝加哥风格引文Guthrie, George M. Six Perspectives on the Philippines. Manila: Bookmark, 1968.
MLA引文Guthrie, George M. Six Perspectives on the Philippines. Bookmark, 1968.
警告：这些引文格式不一定是100％准确.