American Association for the Advancement of Science, 2018
Majalah, Jurnal, Buletin
Ridley, B.K., author
Routledge, 2001
Buku Teks
Leaf, Murray J.
Columbia University Press, 1979
Buku Teks
van der Dussen, Jan
Springer, 2012
eBooks
edited, Nathan Reingold; edited, Ida H. Reingold
University of Chicago Press, 1981
Buku Referensi