def previous_page_url(self):
        """
        :return str: Returns a link to the previous_page_url or None if doesn't exist.
        """
        if 'meta' in self._payload and 'previous_page_url' in self._payload['meta']:
            return self._payload['meta']['previous_page_url']
        elif 'previous_page_uri' in self._payload and self._payload['previous_page_uri']:
            return self._version.domain.absolute_url(self._payload['previous_page_uri'])

        return None