Briggs, David J., author
Longman Scientific & Technical, 1994
Buku Teks
Herren, Ray V.
Delmar Learning , 2013
Buku Teks
Norton, George W., author
McGraw-Hill, 1993
Buku Teks
Fuson, Robert H.
Kendall/Hunt Publishing Co., 1977
Buku Teks
Knox, Paul, author
Edward Arnold , 1994
Buku Teks