Needles, Belverd E., author
Houghton Mifflin, 2008
Buku Teks
Smith, Jack L., author
McGraw-Hill, 1993
Buku Teks
Smith, Jack L., author
McGraw-Hill, 1983
Buku Teks
Smith, Jack L., author
McGraw-Hill, 1989
Buku Teks
Kiger, Jack E., author
Random House, 1984
Buku Teks