- Ruby Language Reference Manual - https://ruby-doc.org/docs/ruby-doc-bundle/Manual/man-1.4/
- Details of Active Record - https://guides.rubyonrails.org/active_record_basics.html
- Best Website - https://www.rubyguides.com/
- &. operator - https://mitrev.net/ruby/2015/11/13/the-operator-in-ruby/