Hirsch, Eric Donald, Jr.
University of Chicago Press, 1976
Buku Teks
Whitehead, Alfred North, 1861-1947
The Free Press , 1968
Buku Teks
Crusius, Timothy W.
McGraw-Hill, 2002
Buku Teks
Petrie, W.M. Flinders
Cambridge University Press, 2014
eBooks
Yap-Diangco, Robert T.
MCS Enterprises, 1971
Buku Teks