Savitri Ramaiah, author
Gramedia, 2004
Buku Teks
kumar, Vijaya
Gramedia, 2004
Buku Teks
Crowe, Mary, author
MacIntyre Purcell Pub, 2010
Buku Teks
Stebben, Gregg, author
Pocket Books, 1999
Buku Referensi
Davis, Kenneth C., author
Perennial, 2004
Buku Teks