APA (7th ed.) Citation

Haeckel, E. (2019). Archivmaterialien zu Ernst Haeckel, 1834-1919.

Chicago Style (17th ed.) Citation

Haeckel, Ernst. Archivmaterialien Zu Ernst Haeckel, 1834-1919. 2019.

MLA (9th ed.) Citation

Haeckel, Ernst. Archivmaterialien Zu Ernst Haeckel, 1834-1919. 2019.

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