APA Citation

Kepler, J., & Caspar, M. (1939). Welt-Harmonik. Berlin: Oldenbourg.

Chicago Style Citation

Kepler, Johannes, and Max Caspar. Welt-Harmonik. Berlin: Oldenbourg, 1939.

MLA Citation

Kepler, Johannes, and Max Caspar. Welt-Harmonik. Berlin: Oldenbourg, 1939.

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