Haag, Vincent H.
Holt, Rinehart and Winston, 1968
Buku Teks
Whitehead, Alfred North, 1861-1947, author
Oxford University Press, 1969
Buku Teks
Horner, Donald H., author
Rinehart, 1973
Buku Teks
White, Paul A., author
Dickenson, 1970
Buku Teks
Tan, S.T. , author
PWS Publishing Company, 1994
Buku Teks