Bell, E.T.
"New York: McGraw-Hill, 1951",
Buku Teks
Mikami, Yoshio
Chelsea , 1974
Buku Teks
Bergamini, David, author
Time Incorporated, 1963
Buku Referensi
Ghislaine Gueudet
Springer Science, 2012
eBooks
Jain, Surender Kumar, author
The Australia National University , 1982
Buku Teks