Brookshear, J. Glenn
Benjamin/Cummings Publishing, Company, Inc., 1994
Buku Teks
Brookshear, J. Glenn
Pearson, 2019
Buku Teks
American Association for the Advancement of Science, 2018
Majalah, Jurnal, Buletin
by Geoff Green ... [and others]
John Muray, 1975
Buku Referensi
Derry, Gregory N.
Princeton University Press , 1999
Buku Teks SO