Tobin, Allan J.
Asking about life, vol.3
Harcourt College Publishing, 2001
 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
Belk, Collen
Biology science for life
Pearson - Benjamin Cummings, 2008
 Buku Teks
Presson, Joelle
Biology: dimensions of life
McGraw-Hill, 2008
 Buku Teks