Howard, Bion B.
McGraw-Hill Book Company, Inc., 1953
Buku Teks
Eiteman, David K., author
Pearson, 2010
Buku Teks
Eiteman, David K., author
Pearson, 2001
Buku Teks
Hunt, Pearson, author
Richard D. Irwin, [Date of publication not identified]
Buku Teks
Eitman, David K., author
Perason, 2001
Buku Teks