Watt, A. (2014). Database design (2nd Ed.). Open Textbook Library. Chapter 8 of this open-source textbook provides definitions and explanations of entity-relationship diagrams.
Watt, A. (2014). Database design (2nd Ed.). Open Textbook Library Chapter 12 of this open-source textbook provides information and examples of normalization.
University of Regina. (2017). Data modeling and entity relationship diagram (ERD). Retrieved from http://www.cs.uregina.ca/Links/class-info/215/erd/ This website provides information on ERDs and relationship types.
