Attenborough, David
The life of mammals: life in the trees
BBC Worldwide Limited, 2004
 Multimedia
Black, Kenneth
Life insurance
Prentice-Hall, 1994
 Buku Teks
Dyson, Freeman J.
Origins of life
Cambridge University Press, 1999
 Buku Teks
A life in literacy
 Artikel Jurnal
Postlethwait, John H.
The nature of life
McGraw-Hill Publishing Company, 1989
 Buku Referensi