Johannes M. Bauer, Achim Lang, Volker Schneider, editors
[Springer, ], 2012
eBooks
Nanda, Vic
McGraw-Hill, 2011
Buku Teks
Reese, Charles D.
CRC Press, 2009
Buku Referensi
Asfahl, C. Ray
Pearson/Prentice Hall, 2004
Buku Teks
Arnold, part of the Hodder Headline group, 2018
Majalah, Jurnal, Buletin