Gaya APA

Ph.D., D, B. et al (2006). What Happy Companies Know: how the new Science of Happiness Can Change Your Company for the Better . : Pearson Prentice Hall.

Gaya MLA

Ph.D., Dan, Baker,. et al. "What Happy Companies Know: how the new Science of Happiness Can Change Your Company for the Better". : Pearson Prentice Hall, 2006. Text.