Smith, David Lee, author
John Wiley & Sons, 2011
Buku Teks
Allen, Edward, author
Oxford University Press, 2005
Buku Teks
Moore, Fuller
McGraw-Hill, 1993
Buku Teks
Bloomer, Kent C., author
Yale University Press, 1977
Buku Teks
edited by Jonathan Hill
Routledge, 1998
Buku Teks