Bailey, Edward P., author
Prentice-Hall, 2002
Buku Teks
Gartside, L. (Leonard), author
Macdonald and Evans, 1982
Buku Teks
Lesikar, Raymond V. (Raymond Vincent), author
Dow Jones-Irwin , 1974
Buku Teks
Flesch, Rudolf, author
Harper & Brothetrs, 1960
Buku Teks
Capezio, Peter J., 1947-, author
McGraw-Hill, 2010
Buku Teks