American Association for the Advancement of Science, 2018
Majalah, Jurnal, Buletin
Ridley, B.K., author
Routledge, 2001
Buku Teks
Williams, Malcolm, 1953-, author
Routledge, 2000
Buku Teks
Tillery, Bill W., author
McGraw-Hill, Higher Education, 2007
Buku Teks
Weisz, Paul B., author
McGraw-Hill, 1963
Buku Teks