References
Anatomy of a CNA. (n.d.) CNA Classes Online. PNG file.
Retrieved from http://cnaclasses-online.net/wpcontent/uploads/Anatomy-Of-A-CNA.png
Wang, S. (2014). Statistical Discrimination, Productivity, and
the Height of Immigrants. Retrieved from
http://assets.wharton.upenn.edu/~was/height_wang.pdf