What is Copyright Law?
Copyright http://www.wipo.int/copyright/en/
Copyright Basics - https://www.copyright.gov/circs/circ01.pdf
Frequently Answered Questions on Copyright http://www.wipo.int/copyright/en/faq_copyright.html
Line between copying something and making something original:
The Copyright Question: The Difference Between Inspiration and Infringement - https://www.business.com/articles/the-copyright-question-the-difference-between-inspiration-and-infringement/Graphic Design Copyright Laws: Inspiration vs. Infringement - http://www.howdesign.com/featured/graphic-design-copyright-laws-inspiration-vs-infringement/Copyright and Wrong: A Basic Guide for Designers - http://www.sexdrugshelvetica.com/copyright-and-wrong-a-basic-guide-for-designers/