APA (7th ed.) Citation

Umbach, W. (1971). Über symmetrische Differenzen.

Chicago Style (17th ed.) Citation

Umbach, Wolf-Rüdiger. Über Symmetrische Differenzen. 1971.

MLA (9th ed.) Citation

Umbach, Wolf-Rüdiger. Über Symmetrische Differenzen. 1971.

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