APA (7th ed.) Citation

Ludewig, P. (1921). Radioaktivität. de Gruyter.

Chicago Style (17th ed.) Citation

Ludewig, Paul. Radioaktivität. Berlin [u.a.]: de Gruyter, 1921.

MLA (9th ed.) Citation

Ludewig, Paul. Radioaktivität. de Gruyter, 1921.

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