Mair, George
Aurum Press, 1994
Buku Teks
Spears, Lynne, author
Thomas Nelson, 2008
Buku Teks
Abercrombie, Stanley, author
MIT Press, c1995
Buku Teks
Santana, Carlos, author
Little, Brown and Company, 2014
Buku Teks
Cunliffe, Marcus, author
A Mentor Books, 1963
Buku Teks