Drexel, J. E. Archivmaterialien zu Joseph Eduard Drexel, 1896-1976.
芝加哥风格引文Drexel, Joseph Eduard. Archivmaterialien Zu Joseph Eduard Drexel, 1896-1976.
MLA引文Drexel, Joseph Eduard. Archivmaterialien Zu Joseph Eduard Drexel, 1896-1976.
警告：这些引文格式不一定是100％准确.
