Callmer, C. (2019). Archivmaterialien zu Christian Callmer, 1908-1985.
Chicago Style (17th ed.) CitationCallmer, Christian. Archivmaterialien Zu Christian Callmer, 1908-1985. 2019.
MLA引文Callmer, Christian. Archivmaterialien Zu Christian Callmer, 1908-1985. 2019.
警告:這些引文格式不一定是100%准確.