APA (7th ed.) Citation

Duysen, F. (1925). Unkräuter. de Gruyter.

Chicago Style (17th ed.) Citation

Duysen, Franz. Unkräuter. Berlin [u.a.]: de Gruyter, 1925.

MLA (9th ed.) Citation

Duysen, Franz. Unkräuter. de Gruyter, 1925.

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