APA (7th ed.) Citation

Haeckel, H. (2019). Archivmaterialien zu Heinrich Haeckel, 1859-1921.

Chicago Style (17th ed.) Citation

Haeckel, Heinrich. Archivmaterialien Zu Heinrich Haeckel, 1859-1921. 2019.

MLA (9th ed.) Citation

Haeckel, Heinrich. Archivmaterialien Zu Heinrich Haeckel, 1859-1921. 2019.

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