The Witch’s Qabala  by Ellen Canon Reed

Chapter 4,  pgs.41- 44

The Shining Paths  by Dolores Ashcroft-Nowicki            

pgs. 218-221   Meditation on Chokmah

A Practical Guide to Qabalistic Symbolism  by Gareth Knight

Chapter VII  (pgs. 76-86)

The Mystical Qabala  by Dion Fortune

Chapter 16

Magic of the Qabalah  by Kala Trobe

pgs. 189-203

Other Sources:

A Garden of Pomegranates,  Israel Regardie 

The Middle Pillar,  Israel Regardie

The Elements of Qabalah,  Will Parfitt

Magical States of Consciousness,  Melita Denning and Osbourne Phillips

Tarot and the Tree,  Isabel Kliegman

The Chicken Qabalah,  Lon Milo Duquette

The Miracle Tree,  R.J. Stewart

The Ladder of Lights,  William Gray