Paul Hill; Henry Preston (October 11, 2004). "Back to the Future with 'THX 1138'". AWN.com (Interview). Interviewed by Bill Desowitz. Archived from the original on January 15, 2017. Retrieved December 27, 2016.
Ravalli, Richard (2016). "George Lucas Out of Love: Divorce, Darkness, and Reception in the Origin of PG-13". The Historian. 78 (4): 690–709. doi:10.1111/hisn.12337. S2CID151821638.
"THX 1138". Rotten Tomatoes. Archived from the original on May 4, 2011. Retrieved April 8, 2013.
semanticscholar.org
api.semanticscholar.org
Ravalli, Richard (2016). "George Lucas Out of Love: Divorce, Darkness, and Reception in the Origin of PG-13". The Historian. 78 (4): 690–709. doi:10.1111/hisn.12337. S2CID151821638.
Paul Hill; Henry Preston (October 11, 2004). "Back to the Future with 'THX 1138'". AWN.com (Interview). Interviewed by Bill Desowitz. Archived from the original on January 15, 2017. Retrieved December 27, 2016.