White, Thomas Y
Prentice-Hall, 1988
Buku Teks
Fried, Charles
Harvard University Press, 1978
Buku Teks
White, Thomas I.
NJ John Wiley & Sons,, 2017
Buku Teks
Bunn, Isabella D.
Hart Publishing, 2012
Buku Teks
Kingdom, Elizabeth F.
Edinburgh University Press, 1991
Buku Teks