Castle, Winifred M.
Churchil Livingtone, 1979
Buku Teks
Wilcox, Rand R., author
Oxford University Press, 2009
Buku Teks
Simpson, Tan S.
ITB Press, 1988
Buku Teks
Salkind, Neil J., author
Sage Publications, 2004
Buku Teks
Kirkwood, Betty R.
Cambridge, Mass. Blackwell, 1988
Buku Teks