مصادر الكتاب
| Dresser | (1) History of Ancient and Medieval Philosophy |
| Alexander | (2) A short History of Philosophy |
| (3) Philosophy and Life of Bacon. | |
| Westaway | (4) The Scientific Method. |
| Durant وقد عوَّلنا عليه في كثيرٍ من مواضع الكتاب. | (5) The Story of Philosophy. |
| Erdmann | (6) History of Philosophy. |
| Hocking | (7) Types of Philosophy. |
| (8) Modern Philosophy. | |
| Windelband | (9) A History of Philosophy. |
| Box | (10) Handbook to the History of Philosophy. |
| (11) Outline of Modern Belief. |
