Cavanaugh, Joseph M.
Burgess, 1976
Buku Teks
Macri, Nicholas A.
Academic Press, 1992
Buku Teks SO
Macri, Nicholas A.
Academic Press, 1982
Buku Teks SO
Meserve, Bruce E.
Prentice-Hall, 1969
Buku Teks SO
Whitehead, Alfred North, 1861-1947
Oxford University Press, 1969
Buku Teks SO