APA-referens (7:e uppl.)

Nickels, W. G. (2010). Understanding Business (9th.). McGraw Hill.

Chicago-referens (17:e uppl.)

Nickels, William G. Understanding Business. 9th. New Delhi: McGraw Hill, 2010.

MLA-referens (9:e uppl.)

Nickels, William G. Understanding Business. 9th. McGraw Hill, 2010.