Dilts, David A.
McGraw-Hill, Irwin, 2007
Buku Teks
Miner, John B.
Macmilan, 1977
Buku Teks
Yoder, Dale
Prentice-Hall, 1962
Buku Teks
Johnson, Rossall James, 1917-
[publisher not identified], [date of publication not identified]
Buku Teks
Monappa, Arun
Tata McGraw-Hill, 1985
Buku Teks