Richards, E.G.
Cambridge University Press, 1980
Buku Teks
edited by Donald A. Seanor
Academic Press, 1982
Buku Teks
Young, Robert J., author
Chapman and Hall, 1991
Buku Teks
Young, Robert J., author
CRC Press, 2011
Buku Teks
Young, Robert J., author
Chapman and Hall, 1980
Buku Teks