2010, 弗雷德里克·A·沙夫 [Frederic A. Sharf], 彼德·哈林顿 [Peter Harrington], translated by 顾明, 《1900年:西方人的叙述:义和团运动亲历者的书信、日记和照片》 [China, 1900: The Eyewitnesses Speak: The Boxer Rebellion as Described by Participants in Letters, Diaries and Photographs], Tianjin: 天津人民出版社, →ISBN, page 285:
They took excellent photos of von Waldersee inspecting the Imperial City on 23 October 1900, and a unique series of photographs documenting the punitive expedition to Kalgan in November 1900.
2010, 司徒雷登 [John Leighton Stuart], translated by 常江, 《在华五十年》 [Fifty Years in China], Haikou: 海南出版社 [Hainan Publishing House], →ISBN, page 160: