Frieling, R. (2019). Archivmaterialien zu Rudolf Frieling, 1901-1986.
Chicago Style (17th ed.) CitationFrieling, Rudolf. Archivmaterialien Zu Rudolf Frieling, 1901-1986. 2019.
MLA引文Frieling, Rudolf. Archivmaterialien Zu Rudolf Frieling, 1901-1986. 2019.
警告:這些引文格式不一定是100%准確.