Bernardus Silvestris & Wetherbee, W. (1973). The cosmographia. Records of civilization.
芝加哥风格引文Bernardus Silvestris 与 Winthrop Wetherbee. "The Cosmographia." Records of Civilization 1973.
MLA引文Bernardus Silvestris 与 Winthrop Wetherbee. "The Cosmographia." Records of Civilization, 1973.
警告：这些引文格式不一定是100％准确.