Nikolsky, Nikolai
Allied , 1988
Buku Teks
McVey, Ruth Thomas
Cornell university, 1962, 1957.
Buku Teks
Weigh, Ken Shen
The Coomercial Press , 1928
Buku Teks
Dallin, David J.
Yale University Press, 1949
Buku Teks
Lensen, George Alexander
Sophia University, 1970
Buku Teks