Leaf, W. Archivmaterialien zu Walter Leaf, 1852-1927.
芝加哥风格引文Leaf, Walter. Archivmaterialien Zu Walter Leaf, 1852-1927.
MLA引文Leaf, Walter. Archivmaterialien Zu Walter Leaf, 1852-1927.
警告：这些引文格式不一定是100％准确.
APA引文
