Frederiksen, Linda, author
Elsevier Ltd.,, 2016
Buku Teks
Norman, Sandy, author
Facet Publishing, 2004
Buku Teks
Thorn, Eric A., author
Jay Books, 1989
Buku Referensi
Strong, William S., author
MIT Press, 1981
Buku Teks
Akester, Patricia, author
Sweet & Maxwell, 2008
Buku Referensi