Additional Information

<%= f.input :subject, as: :multi_value, input_html: { class: 'form-control' } %> <%= f.input :publisher, as: :multi_value, input_html: { class: 'form-control' } %> <%= f.input :source, as: :multi_value, input_html: { class: 'form-control' } %> <%= f.input :language, as: :multi_value, input_html: { class: 'form-control' } %>