Cavanaugh, Joseph M.
Burgess, 1976
Buku Teks
Macri, Nicholas A.
Academic Press, 1992
Buku Teks
Macri, Nicholas A.
Academic Press, 1982
Buku Teks
Whitehead, Alfred North, 1861-1947
Oxford University Press, 1969
Buku Teks
Gelles, Richard J.
McGraw-Hill College , 1999
Buku Teks