hugo-book-theme/layouts/partials/docs/post-meta.html

{{ with .Date}}
  <h5>{{ partial "docs/date" (dict "Date" . "Format" $.Site.Params.BookDateFormat) }}</h5>
{{ end }}

{{ range $taxonomy, $_ := .Site.Taxonomies }}
  {{ with $terms := $.GetTerms $taxonomy }}
  <div>
    {{ range $n, $term := $terms }}{{ if $n }}, {{ end }}
      <a href="{{ $term.RelPermalink }}">{{ $term.Title }}</a>
    {{- end }}
  </div>
  {{ end }}
{{ end }}