APA (7th ed.) Citation

Kopp, E. (1926). Das Kleinrentnerproblem. Kertel.

Chicago Style (17th ed.) Citation

Kopp, Eitel-Georg. Das Kleinrentnerproblem. Berlin: Kertel, 1926.

MLA (8th ed.) Citation

Kopp, Eitel-Georg. Das Kleinrentnerproblem. Kertel, 1926.

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