code: def citation(print_out=True, short=False):
      text = short_citation_text if short else citation_text
      if print_out:
          # Use a Python2/3 compatible form of printing:
          from sys import stdout
  
          stdout.write(text)
      return text
  
label_desc: Use image node_id 1 for calling a global function with example usage: citation(print_out, short) and returns: text