APA (7th ed.) Citation

Leuendorf, H. (1989). Ernst Haeckel.

Chicago Style (17th ed.) Citation

Leuendorf, Hannelore. Ernst Haeckel. 1989.

MLA (9th ed.) Citation

Leuendorf, Hannelore. Ernst Haeckel. 1989.

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