APA (7th ed.) Citation

Haeckel, E. (2021). Ewigkeit (10. Tsd., Reprint 2021.). De Gruyter.

Chicago Style (17th ed.) Citation

Haeckel, Ernst. Ewigkeit. 10. Tsd., Reprint 2021. Berlin ; Boston: De Gruyter, 2021.

MLA (9th ed.) Citation

Haeckel, Ernst. Ewigkeit. 10. Tsd., Reprint 2021. De Gruyter, 2021.

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