Houn, Franklin W.
Prenrice-Hall , 1973
Buku Teks
Mortimer, Rex, author
Equinox, 2006
Buku Teks
Starr, John Bryan, author
Harper & Row, 1973
Buku Teks
Irwin, Richard Gregg, author
Harvard University Press, 1953
Buku Teks
Hawkes, David, 1964-, author
Routledge, 1996
Buku Teks