Spence, Iain (2012). The Hare Hypothesis. Bast's Blend. ASINB009E2YUJM. Chapter 2 - The Four Life Scripts.
Spence, Iain (2012). The Hare Hypothesis. Bast's Blend. ASINB009E2YUJM. Chapter 5 - The Sequential Integration of the Four Life Scripts.
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Wilson, Robert Anton (1983). Prometheus Rising. Falcon Press. p. 55. ISBN9781561840564. 'She/He is self-critical, shy, timid, easily led, "spineless," and always looking for somebody to Take Charge and Give Orders. The unearthly Angel, or in modern symbolism, the Flower Child'.
Wilson, Robert Anton (1983). Prometheus Rising. Falcon Press. p. 52. ISBN9781561840564. 'For instance, a widely used psychological test in this country the Leary Interpersonal Analysis Grid (1957) divides the four quadrants into sixteen sub-quadrants and allows one to grade each in terms of moderate-to-excessive tendency to behave that way.'
Harris, Thomas (1973). I'm Ok - You're Ok. Pan Books. p. 42. ISBN0 330 23543 5. 'I'm not ok - you're ok: this is the universal position of early childhood, being the infant's logical conclusion from the situation from birth and infancy.'