APA (7th ed.) Citation

Baldus, R. (1927). Nichteuklidische Geometrie. Gruyter.

Chicago Style (17th ed.) Citation

Baldus, Richard. Nichteuklidische Geometrie. Berlin [etc.]: Gruyter, 1927.

MLA (9th ed.) Citation

Baldus, Richard. Nichteuklidische Geometrie. Gruyter, 1927.

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