APA (7th ed.) Citation

Hülsen, C., & Ihm, M. (1903). Arretium, Nachtrag.

Chicago Style (17th ed.) Citation

Hülsen, Christian, and Max Ihm. Arretium, Nachtrag. 1903.

MLA (9th ed.) Citation

Hülsen, Christian, and Max Ihm. Arretium, Nachtrag. 1903.

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