Schaeffer, F. C. (2019). Archivmaterialien zu Frederick C. Schaeffer, 1792-1831.
芝加哥风格引文Schaeffer, Frederick C. Archivmaterialien Zu Frederick C. Schaeffer, 1792-1831. 2019.
MLA引文Schaeffer, Frederick C. Archivmaterialien Zu Frederick C. Schaeffer, 1792-1831. 2019.
警告：这些引文格式不一定是100％准确.