The classical written sources of Kabbalah are:
» Sefer Yetzirah (Book of Formation)
» Zohar (Book of Splendors):
-The Book of Hidden Mystery
-The Great Sacred Assembly
-The Lesser Sacred Assembly
» Beth Elohim (House of the Elohim)
» Sefer Sephirot (Book of Emanations)
» Aesch Mezareph (Purifying Fire)
Source: Shiva Shambho