Meserve, Bruce E.
Introduction to mathematics
Prentice-Hall, 1969
 Buku Teks SO
Whitehead, Alfred North, 1861-1947
An introduction to mathematics
Oxford University Press, 1969
 Buku Teks SO
Patrick, George Thomas White
Introduction to philosophy
George Allen and Unwin, 1925
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Brightman, Edgar Sheffield
An Introduction to philosophy
Holt, Rinehart and Winston, 1961
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Randall, John Herman
Philosophy : an introduction
Barnes & Noble, 1957
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