APA (7th ed.) Citation

Ratzel, F., & Helmolt, H. F. (2019). Kleine Schriften, Band 1 (Reprint 2019.). Oldenbourg Wissenschaftsverlag. https://doi.org/10.1515/9783486732016

Chicago Style (17th ed.) Citation

Ratzel, Friedrich, and Hans F. Helmolt. Kleine Schriften, Band 1. Reprint 2019. Berlin ; Boston: Oldenbourg Wissenschaftsverlag, 2019. https://doi.org/10.1515/9783486732016.

MLA (9th ed.) Citation

Ratzel, Friedrich, and Hans F. Helmolt. Kleine Schriften, Band 1. Reprint 2019. Oldenbourg Wissenschaftsverlag, 2019. https://doi.org/10.1515/9783486732016.

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