APA Citation
Zeppelin, Ferdinand, Graf von,. Ferdinand Graf von Zeppelin letter, dated 19 Keplerstrasse, Stuttgart, 13 December 1900. Retrieved from https://library.si.edu/digital-library/book/ferdinandgrafvo00zepp
MLA Citation
Zeppelin, Ferdinand, Graf von,. Ferdinand Graf von Zeppelin letter, dated 19 Keplerstrasse, Stuttgart, 13 December 1900. https://library.si.edu/digital-library/book/ferdinandgrafvo00zepp
Chicago
Zeppelin, Ferdinand, Graf von,. Ferdinand Graf von Zeppelin letter, dated 19 Keplerstrasse, Stuttgart, 13 December 1900. https://library.si.edu/digital-library/book/ferdinandgrafvo00zepp
Warning: These citations may not always be complete (especially for serials).