APA (7th ed.) Citation

Darwin, C. (1861). Darwin, Charles Sept. 17, 1861. Zenodo.

Chicago Style (17th ed.) Citation

Darwin, Charles. Darwin, Charles Sept. 17, 1861. Zenodo, 1861.

MLA (9th ed.) Citation

Darwin, Charles. Darwin, Charles Sept. 17, 1861. Zenodo, 1861.

Warning: These citations may not always be 100% accurate.