editor, Andrew Massey
Edwar Elgar, 2011
Buku Teks
Buchheim, Robert W., author
Random House, 1959
Buku Referensi
edited by Annie Cavalier, Daniele Spehner, Bruno M. Humbel
CRC Press, Taylor & Francis Group, 2009
Buku Teks
Lind, Owen T.
Kendall / Hunt Publ., 1985
Buku Teks
edited by Ann Bowling, Shah Ebrahim
Open University Press, 2007
Buku Teks