cwalnuts

[Psychological Types] by Carl Gustav Jung

[Personality Types] by Daryl Sharp

[About the inferior function] by Marie-Louise von Franz

[About the four irrational types] by Marie-Louise von Franz

[About the four rational types] by Marie-Louise von Franz

Socionics Guide for starters

Wikisocion

[Gifts Differing] by Isabel Briggs Myers

[Personality Type] by Lenore Thomson

[Character and Neurosis] by Claudio Naranjo

[The Enneagram of Society] by Claudio Naranjo

[The Complete Enneagram] by Beatrice Chestnut

[The Enneagram Guide to Waking Up] by Beatrice Chestnut

[From Fixation to Freedom] by Eli Jaxon-Bear

[The Enneagram of Passions and Virtues] by Sandra Maitri

Enneagram Subtypes

[Syntax of love] by Alexander Afanasiev

PY Attitudes

1st Emotion

2nd Emotion

3rd Emotion

4th Emotion

1st Logic

2nd Logic

3rd Logic

4th Logic

1st Physics

2nd Physics

3rd Physics

4th Physics

1st Will

2nd Will

3rd Will

4th Will

PY Subtypes

[Personality] by Daniel Nettle

4 Primary Temperaments

15 Temperament Blends