| Title | Author / Editor | Place | Publisher | Year |
| A Philosophical Dictionary | Voltaire | South Autrallia | eBooks@Adelaide | 2009 |
| An Introduction to Philosophy | George Stuart Fullerton | New York | Macmillan and Co | 1915 |
| Natural Philosophy | Wilhelm Ostwald | New York | Henry Holt and Co. | 1910 |
| Notes on Philosophy of Science | Gary Hardegree | United States | UMass Amherst | 2001 |
| Philosophy and Living | Olaf Stapledon | South Autrallia | eBooks@Adelaide | 2009 |
| The philosophy of disenchantment | Edgar Saltus | New York, Boston | Houghton Mifflin Company | 1887 |
| The Problems of Philosophy | Bertrand Russell | Not Available | Project Gutenberg | 2004 |
