APA (7th ed.) Citation

Eifrig, C. W. G. (1915). Cory's Least Bittern in Illinois. Zenodo.

Chicago Style (17th ed.) Citation

Eifrig, Charles William Gustav. Cory's Least Bittern in Illinois. Zenodo, 1915.

MLA (9th ed.) Citation

Eifrig, Charles William Gustav. Cory's Least Bittern in Illinois. Zenodo, 1915.

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