Heer, F. S. Archivmaterialien zu Fridolin Samuel Heer, 1884-1933.
芝加哥风格引文Heer, Fridolin Samuel. Archivmaterialien Zu Fridolin Samuel Heer, 1884-1933.
MLA引文Heer, Fridolin Samuel. Archivmaterialien Zu Fridolin Samuel Heer, 1884-1933.
警告：这些引文格式不一定是100％准确.
