APA (7th ed.) Citation

Engelmann, G. (1849). Engelmann, George May 13, 1849. Zenodo.

Chicago Style (17th ed.) Citation

Engelmann, George. Engelmann, George May 13, 1849. Zenodo, 1849.

MLA (9th ed.) Citation

Engelmann, George. Engelmann, George May 13, 1849. Zenodo, 1849.

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