Offener Brief an Herrn Prof. Haeckel in Jena

Chicago citation style
Semper, C. (Carl), 1832-1893. Offener Brief an Herrn Prof. Haeckel in Jena. 1877. Retrieved from the Digital Public Library of America, http://catalog.hathitrust.org/Record/100232829. (Accessed December 14, 2018.)
APA citation style
Semper, C. (Carl), 1832-1893, (1877) Offener Brief an Herrn Prof. Haeckel in Jena. Retrieved from the Digital Public Library of America, http://catalog.hathitrust.org/Record/100232829
MLA citation style
Semper, C. (Carl), 1832-1893. Retrieved from the Digital Public Library of America <http://catalog.hathitrust.org/Record/100232829>.
Note: These citations are programmatically generated and may be incomplete.