this is the example of excellent essay
Corporate social responsibility and development in Africa,Campbell(2012)
Reasoning about responsibilities, Cragg and Greenbaum(2002)
Artificial persons against nature, Northcott(2012)
Worrell and Appleby(2000)
up to code , Paint et al. (2005) — this is compulsory for the essay and rest of u can use it and u have to related the principle with the essay.