def save_to(path, options = {})
      options[:quotes] ||= %w({ })

      File.open(path, 'w:UTF-8') do |f|
        f.write(to_s(options))
      end

      self
    end
def save_to(path, options = {})
      options[:quotes] ||= %w({ })

      File.open(path, 'w:UTF-8') do |f|
        f.write(to_s(options))
      end

      self
    end
Saves the bibliography to a file at the given path. Returns the bibliography.