Hammer, Ellen J.
Stanford University Press, 1954
Buku Teks
Greenberg, Edward S., author
Pearson/Longman, 2005
Buku Teks
Duncanson, Dennis J
Oxford University Press, 1968
Buku Teks
J.J. Raj
MPH Group, 2007
Buku Teks
Riant Nugroho Dwidjowijoto, author
Elex Media Komputindo, 2001
Buku Teks