APA استشهاد

Unruh, G. (2010). Earth, Inc: Using nature's rules to build sustainable profits. Harvard Business Press.

استشهاد بنمط شيكاغو

Unruh, Gregory. Earth, Inc: Using Nature's Rules to Build Sustainable Profits. Boston: Harvard Business Press, 2010.

MLA استشهاد

Unruh, Gregory. Earth, Inc: Using Nature's Rules to Build Sustainable Profits. Harvard Business Press, 2010.