Copi, Irving M., author
Prentice-Hall, 1979
Buku Teks
Carnap, Rudolf, author
Dover Publications, 1958
Buku Teks
Standley, Gerald B., author
Houghton Mifflin, 1971
Buku Teks
Langer, Susanne K., author
Dover, 1967
Buku Teks
Chang, Chin-Liang, author
Academic Press, 1973
Buku Teks