Williams, Linda D., author
McGraw-Hill, 2005
Buku Teks
Cunningham, William P., author
Mc Graw Hill, 2010
Buku Teks
Cunningham, William P., author
Mc Graw Hill, 2012
Buku Teks
Allaby, Michael, author
Routledge , 1996
Buku Teks
Kaufman, Robert K., author
McGraw-Hill, 2008
Buku Teks