Balachanda Chakkingal Sekhar, author
Academy of sciences Malaysia, 2010
Buku Teks
Gipson, James H.
McGraw-Hill Book, 1984
Buku Teks
Lloyd, Elizabeth Jane
New York: Simon ans Schuster, 1990,
Buku Referensi
Lloyd, Elizabeth Jane, author
Simon & Schuster, 1990
Buku Referensi
King, Stephen, author
Naura Books, 2019
Buku Teks