Morris, David, author
Houghton-Mifflin, 1949
Buku Teks
Gita Kumala, author
Bestmedia, 2016
Buku Teks
Kennedy, Hugh, author
Pustaka Alvabet, 2010
Buku Teks
Findling, John E,
Greenwood Press, 1998
Buku Teks
Finding, John E.
Greenwood Press, 1997
Buku Teks