Baumeister, Roy F., author
Wardsword cengage learning, 2011
Buku Teks
Baumeister, Roy F., author
Cengage Learning, 2017
Buku Teks
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