Hammersley, Martyn, author
Paul Chapman Publishing, 2002
Buku Teks
Hoy, Wayne K., author
Random House , 1978
Buku Teks
Hoy, Wayne K., author
McGraw-Hill, 2013
Buku Teks
Lodico, Marguerite G., author
Jossey-Bass, 2010
Buku Teks
Orr, Shannon K., author
CRC Press, 2014
Buku Teks