APA (7th ed.) Citation

Haas, O. (1942). The Vernay collection of cretaceous (Albian) ammonites from Angola.

Chicago Style (17th ed.) Citation

Haas, Otto. The Vernay Collection of Cretaceous (Albian) Ammonites from Angola. New York, 1942.

MLA (9th ed.) Citation

Haas, Otto. The Vernay Collection of Cretaceous (Albian) Ammonites from Angola. 1942.

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