Paterson, Craig, author
Learning Matters, 2011
Buku Teks
Petherick, Wayne A., author
Elsevier, 2010
Buku Teks
Barnes, Harry Elmer, author
Prentice Hall of India, 1966
Buku Teks
Barkan, Steven E., author
Prentice-Hall, 2012
Buku Teks
Barkan, Steven E., author
Pearson/Prentice Hall, 2006
Buku Teks