Naiman, Arnold
McGraw-Hill, 1983
Buku Teks
Sellers, Gene R.
WB. Saunders, 1977
Buku Teks
Wonnacott, Thomas H., 1935-, author
John Wiley & Sons, 1990
Buku Teks
Mann, Prem S, author
Jon Wiley & Sons, 2011
Buku Teks
Godfrey, M.G., author
Edward Arnold , 1986
Buku Teks