Gilham, Oliver
Islan Press, 2002
Buku Teks
Jacobs, Jane, author
Random House , 1961
Buku Teks
Levy, John M., author
Pearson Education International, 2009
Buku Teks
Easterling, Keller
MIT Press, 1999
Buku Teks
Levy, John M., author
Routledge, 2013
Buku Teks