APA (7th ed.) Citation

Ostwald, W. (2011). Ernst Haeckel (Neuausg.). Lenz.

Chicago Style (17th ed.) Citation

Ostwald, Wilhelm. Ernst Haeckel. Neuausg. Neu-Isenburg: Lenz, 2011.

MLA (9th ed.) Citation

Ostwald, Wilhelm. Ernst Haeckel. Neuausg. Lenz, 2011.

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