Breen, Ann
McGraw-Hill, 1996
Buku Teks
Morrison, John
Penguin Books, 1984
Buku Teks
Design Media Publishing Limited
Design Media Publishing Limited, 2010
Buku Teks
editors and contributors, Joseph J. Norton, Thomas L. Bloodworth ; editorial coordinator, Terry K. Pennington
Martinus Nijhoff Publishers, 1995
Buku Teks
Rapp, Stan
McGraw-Hill , 1994
Buku Teks