Russell, Bertrand, 1872-1970
Our knowledge of the external world: as a field for scientific method in philosophy
George Allen & Unwin, 1949
 Buku Teks SO
Steiner, Rudolf
The philosophy of spiritual activity: fundamentals of a modern view of the world
Rudolf Steiner, 1963
 Buku Teks SO
Dewey, John
Intelligence in the modern world: John Dewey`s philosophy
The Modern Library, 1939
 Buku Teks SO
Keedy, Mervin L.
Geometry: a modern introduction / Mervin L. Keedy, Charles W. Nelson
Addison-Wesley Pub. Co. , 1965
 Buku Teks
Hoffding, Harold
A history of modern philosophy: a sketch of the history of philosophy. From the close of the renaissance to our own day
Macmillan, 1955
 Buku Teks SO