APA (7th ed.) Citation

Hoeppe, G. (2007). Why the sky is blue: Discovering the color of life. Princeton University Press.

Chicago Style (17th ed.) Citation

Hoeppe, Gotz. Why the Sky Is Blue: Discovering the Color of Life. Princeton, N.J: Princeton University Press, 2007.

MLA (9th ed.) Citation

Hoeppe, Gotz. Why the Sky Is Blue: Discovering the Color of Life. Princeton University Press, 2007.

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