self-referential

/S EH1 L F R EH0 F ER0 EH0 N CH AH0 L/
adjective
  1. 1

    That or who refers to itself or oneself.

  2. 2

    (specifically) In a literary work: referring to the author or the author's other works.

Source: https://en.wiktionary.org/wiki/self-referential