by Margaret J. Hartman [and others]
Kendall/Hunt, 1976
Buku Teks
Darwin, Charles
Oxford University Press, 2009
Buku Teks
Noble, Elmer R.
Lea & Febiger, 1961
Buku Teks
Dillon, Lawrence S.
Macmillan Company, 1966
Buku Referensi
by Elmer R. Noble ... [and others]
Lea & Febiger, 1989
Buku Referensi