Boolos, George, author
Harvard University Press, 1998
Buku Teks
Copi, Irving M., author
Macmillan, 1961
Buku Teks
Copi, Irving M., author
Prentice-Hall, 1995
Buku Teks
Mates, Benson, author
Oxford University Press, 1965
Buku Teks
Copi, Irving M., author
Macmillan, 1972
Buku Teks