DVS Edition Citation

(2001, 19. June). Biological clocks. Zugriff unter http://www.pponline.co.uk/encyc/0081.htm

APA (7th ed.) Citation

Biological clocks.

Chicago Style (17th ed.) Citation

Biological Clocks.

MLA (9th ed.) Citation

Biological Clocks.

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