Drummond Siobhan
Butterworth, 2001
Buku Teks
by Greg Bounds [and others]
McGraw-Hill, 1994
Buku Teks
Prentice-Hall, 1995
Buku Teks
Goetsch, David L., author
Pearson, 2016
Buku Teks
by Dale H. Besterfield ... [and others]
Prentice-Hall, 1995
Buku Teks