APA (7th ed.) Citation

Schmidt, K. Rechen-Vorteile etc (o.A.).

Chicago Style (17th ed.) Citation

Schmidt, Karl. Rechen-Vorteile Etc. o.A. Altenburg (Thür.).

MLA (8th ed.) Citation

Schmidt, Karl. Rechen-Vorteile Etc. o.A.

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