Spinoza, Benedict de
On the improvement of the understanding : The ethics ; Correspondence
Dover, 1955
Buku Teks SO
Billington, Ray
Understanding eastern philosophy
Routledge , 1997
Buku Teks SO
Von Mises, Ludwig, 1881-1973
Positivism: a Study in Human Understanding
George Braziller, 1956
Buku Teks SO
Locke, John
An essay concerning human understanding
J.M. Dent & Sons, 1947
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Schuon, Frithjof
Memahami Islam = Understanding islam
Pustaka, 1983
Buku Teks SO