Artikel Jurnal
Jesus Ballesteros, Encarnacion Fernandez Ruiz-Galvez, Pedro Talavera, editors
Springer, 2012
Buku Teks
Lautenbach, Geranne, author
Oxford Univ.press, 2014
Buku Teks
Jesss Ballesteros
Springer, 2012
eBooks
Arden, Mary, author
Oxford University Press, 2015
Buku Teks