Tobin, Allan J
Asking about life
Thomson, Brooks/Cole, 2005
 Buku Teks
Tobin, Allan J.
Biology now for Tobin/Dusheck : asking about life
Brooks/Cole, Thomson, 2005
 Multimedia
Barnard, Chris
Asking questions in biology : a guide to hypothesis-testing, experimental design and presentation in practical work and research projects
Pearson Prentice Hall, 2007
 Buku Teks
Postlethwait, John H.
Explore life
Brooks/Cole, Thomson Learning, 2003
 Buku Teks
Keosian, John
Origin of life
Reinhold Publishing Corporation, 1964
 Buku Teks