Samuels, Charles E., author
Twayne, 1965
Buku Teks
Pennoyer, Peter, author
Norton, 2003.
Buku Teks
Bailey, Cyril
Oxford University Press, 1951.
Buku Teks
Forbes, Betty A.
Mosby Elsevier, 2007
Buku Teks
Tille, M. Patricia, author
Elsevier, 2014
Buku Teks