Chu, Hsi, author
Probsthain, 1922
Buku Teks
Hume, David
J.M. Dent & Sons , 1959
Buku Teks
Stevenson, Leslie Forster, author
Oxford University Press, 2012
Buku Teks
Lopreato, Joseph, author
Allen & Unwin , 1984
Buku Teks
Ashworth, Peter, author
Psychology Press, 2000
Buku Teks SO