edited by Ernst S. Reese and Frederick J. Lighter
John Wiley & Sons, 1978
Buku Teks
Barrow, Christopher J., author
Cambridge University Press, 1991
Buku Teks
Beer, Jurg, author
Springer, 2012
eBooks
Artikel Jurnal
Knoll, Robert E., author
Harcourt, Brace and Company, 1959
Buku Teks