Dinitto, Diana M. , author
Prentice-Hall, 1987
Buku Teks
Dinitto, Diana M. , author
Prentice-Hall, 2000
Buku Teks
Bell, Winifred
Macmillan Publishing Co. Inc, 1983
Buku Teks
Anderson, Martin
Hover Institution Press, 1978
Buku Teks
Gordon, Margaret S.
N.Y. Columbia University Press , 1963
Buku Teks