Stoll, Robert R.
Dover , 1961
Buku Teks
Carnap, Rudolf, author
Dover Publications, 1958
Buku Teks
edited by Ulrich Hohle and Erich Peter Klement
Kluwer Academic , 1995
Buku Teks
Copi, Irving M., author
Prentice-Hall, 1979
Buku Teks
Dalen, Dirk van, author
Springer-Verlag, 1994
Buku Teks