by Bruce L. Brown [and others]
John Wiley & Sons, 2012
Buku Teks SO
David J. Bartholomew ... [et.al]
CRC Press, Taylor & Francis Group, 2008
Buku Teks
Stevens, James, author
Lawrence Erlbaum Associates, 1986
Buku Teks
Hand, D.J., author
Chapman & Hall, 1987
Buku Teks
Morrison, Donald F., author
McGraw-Hill International Book Company, 1983
Buku Teks