American Association for the Advancement of Science, 2018
Majalah, Jurnal, Buletin
Williams, Malcolm, 1953-
Routledge, 2000
Buku Teks SO
by Geoff Green ... [and others]
John Murray, 1976
Buku Teks SO
Peason, Karl
Meridian Books, 1957
Buku Teks
Dutch, Steven I.
Wadsworth, 1997
Buku Teks