Thomson, Robert, author
Penguin Books, 1974
Buku Teks
edited by Keith J. Holyoak, Robert G. Morrison
Oxford University Press, 2012
Buku Teks
editor, Keith J. Holyoak and Robert G. Morrison
Cambridge University Press, 2005
Buku Teks
edited by Keith J. Holyoak, Robert G. Morrison
Cambridge University Press, 2005
Buku Referensi
Neimark, Edith D., author
Harcourt Brace Javanovich, 1987
Buku Teks