We took these information from     http://ethiopianphilosophy.wordpress.com/
- Ethiopian Philosophy: A Very Brief Introduction
 - A Brief Annotated Bibliography of Ethiopian Philosophy
 - Treatise of Zera Yacob, Chapter I
 - Treatise of Zera Yacob, Chapter II
 - Treatise of Zera Yacob, Chapter III
 - Treatise of Zera Yacob, Chapter IV
 - Treatise of Zera Yacob, Chapter V
 - Treatise of Zera Yacob, Chapter VI
 - Treatise of Zera Yacob, Chapter VII
 - Treatise of Zera Yacob, Chapter VIII
 - Treatise of Zera Yacob, Chapter IX
 - Treatise of Zera Yacob, Chapter X
 - Treatise of Zera Yacob, Chapter XI
 
                   From Others Sources
- Treatise of Zera Yacob (Geez version PDF)
 - Treatise of Welde -Hiwot (Geez version PDF)
 - Hateta Zerayakob (Treaties of Zera Yacob) in Amharic
 - The meditations of Zara Yaquob by Tedros Kiros (PDF)
 - Zar’a Ya’eqob’s Argument For The Existence of God (PDF)
 - The Contribution of Native Ethiopian Philosopher (PDF)
 - African Philosophy In Ethiopia (PDF)
 - A Companion to African Philosophy (PDF)
 - An Introduction to Africana Philosophy (PDF)
 - Understanding African Philosophy (PDF)
 - Enno Littmann. Philosophi Abessini (PDF)