From The SpiritWiki
See Horney 
"Maslow was always committed to the view that self-actualization is the actualization of the 'self'."
- Horney, Karen. Neurosis and Human Growth: Karen Horney: 9780393307757: Gateway - Amazon.Ca. WW Norton, 1991. https://amzn.to/2IQj2Yy.
- Daniels, M. “The Development of the Concept of Self-Actualization in the Writings of Abraham Maslow.” Current Psychological Perspectives 2 (1982): 71.