APA (7th ed.) Citation

Hartlaub, G. (1889). Ornithologische Beiträge. Zenodo.

Chicago Style (17th ed.) Citation

Hartlaub, Gustav. Ornithologische Beiträge. Zenodo, 1889.

MLA (9th ed.) Citation

Hartlaub, Gustav. Ornithologische Beiträge. Zenodo, 1889.

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