APA (7th ed.) Citation

Perko, G. A. (1909). Das Karstphänomen.

Chicago Style (17th ed.) Citation

Perko, G. And. Das Karstphänomen. 1909.

MLA (8th ed.) Citation

Perko, G. And. Das Karstphänomen. 1909.

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