Carroll, John B., author
Prentice-Hall, 1964
Buku Teks
Barnard, Alan, author
Cambridge University Press, 2012
Buku Teks
Recanati, Francois, author
Blackwell, 1993
Buku Teks
Osborn, Alex
Charles Scribner`s Sons, 1952
Buku Teks
Russell, Bertrand, 1872-1970, author
George Allen and Unwin, 1956
Buku Teks