Ramanadham, V.V.
Asia Publishing House, 1963
Buku Teks
Hemmerechts, Kristien
Atlas, 2004
Buku Teks
Buchanan, James M., author
Richard D. Irwin, 1968
Buku Teks
Moore, Alan, author
Gramedia Pustaka Utama, 2006
Buku Teks
Green, D.C., author
Longman, 1993
Buku Teks