Ellis, Roger B., author
Churchill Livingstone, 2004
Buku Teks
West, Richard L., author
Mayfield Publishing company , 2000
Buku Teks
West, Richard L., author
McGraw-Hill Education, 2014
Buku Teks
West, Richard L., author
McGraw-HIll, 2007
Buku Teks
Baran, Stanley J., author
Wadsworth and Cengage Learning, 2012
Buku Teks