Witts, Benjamin (July 2009). "Seeing the Indigo Children". Skeptical Inquirer. Committee for Skeptical Inquiry. Archived from the original on March 28, 2012. Retrieved 20 September 2017.
Lench, H. C.; Levine, L. J.; Whalen, C. K. (2011). "Exasperating or Exceptional? Parents' Interpretations of Their Child's ADHD Behavior". Journal of Attention Disorders. 17 (2): 141–51. doi:10.1177/1087054711427401. PMID22166469. S2CID945004.
Lench, H. C.; Levine, L. J.; Whalen, C. K. (2011). "Exasperating or Exceptional? Parents' Interpretations of Their Child's ADHD Behavior". Journal of Attention Disorders. 17 (2): 141–51. doi:10.1177/1087054711427401. PMID22166469. S2CID945004.
Lench, H. C.; Levine, L. J.; Whalen, C. K. (2011). "Exasperating or Exceptional? Parents' Interpretations of Their Child's ADHD Behavior". Journal of Attention Disorders. 17 (2): 141–51. doi:10.1177/1087054711427401. PMID22166469. S2CID945004.
Witts, Benjamin (July 2009). "Seeing the Indigo Children". Skeptical Inquirer. Committee for Skeptical Inquiry. Archived from the original on March 28, 2012. Retrieved 20 September 2017.