Goldthorpe, John H., author
Oxford University Press, 2000
Buku Teks
Chung, Won Choue
Koreaone press, 1985
Buku Teks
Wiener, Antje, author
Oxford University Press, 2009
Buku Teks
de Barra, G., author
Ellis Horwood, 1981
Buku Teks
Ake, Claude
The Dorsey Press, 1967
Buku Teks