Godfrey, M.G., author
Edward Arnold , 1986
Buku Teks
Rickmers, Albert D., author
McGraw-Hill, 1967
Buku Teks
Wonnacott, Thomas H., 1935-, author
John Wiley & Sons, 1972
Buku Teks
Wonnacott, Thomas H., 1935-, author
John Wiley & Sons, 1990
Buku Teks
Salkind, Neil J., author
Sage, 2000
Buku Teks