added chicago and harvard citation styles

app/models/concerns/with_citations.rb

@@ -13,6 +13,14 @@ module WithCitations
     citation_for("modern-language-association", website: website, locale: locale)
   end
 
+  def citation_chicago(website: nil, locale: nil)
+    citation_for("chicago-author-date", website: website, locale: locale)
+  end
+
+  def citation_harvard(website: nil, locale: nil)
+    citation_for("harvard-cite-them-right", website: website, locale: locale)
+  end
+
   protected
 
   def citation_for(style, website: nil, locale: nil)

app/views/admin/research/hal/publications/static.html.erb

@@ -32,7 +32,15 @@ citations:
   - label: "MLA"
     content: >-
       <%= prepare_html_for_static @about.citation_mla, @website.university %>
+  - label: "Chicago"
+    content: >-
+      <%= prepare_html_for_static @about.citation_chicago, @website.university %>
+  - label: "Harvard"
+    content: >-
+      <%= prepare_html_for_static @about.citation_harvard, @website.university %>
+  <% if @website.default_language.iso_code == "fr" %>
   - label: "ISO 690"
     content: >-
       <%= prepare_html_for_static @about.citation_iso690, @website.university %>
+  <% end %>
 ---
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