McAlpin, Janet, author
England: Longman Group, 1988,
Buku Referensi
Koneru, Aruna, author
Tata McGraw-Hill, 2011
Buku Teks
Chandrasegaran, Antonia, author
McGraw-Hill, 1995
Buku Teks
Camp, Sue C., author
McGraw-Hill, 2001
Multimedia
Langan, John, 1942-, author
MCGraw-Hill, 2001
Multimedia