APA (7th ed.) Citation

Heer, E. Unser Steinbruch (Nachtrag).

Chicago Style (17th ed.) Citation

Heer, Erwin. Unser Steinbruch (Nachtrag).

MLA (8th ed.) Citation

Heer, Erwin. Unser Steinbruch (Nachtrag).

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