Sang guru
Majalah, Jurnal, Buletin
The dictionary of national biography, founded in 1882 by George Smith
edited by Leslie Stephen, Sidney Lee
Oxford University Press, 1950
Buku Referensi
Craven, Paul R.
Biography
Dickenson Publishing, 1968
Buku Teks
The impact of social capital on satisfaction with national policy
2009
Artikel Jurnal
Ramulu, U.S. Sree
Isotopes in agriculture / U. S. Sree Ramulu
Oxford & IBH Publishing Co., 1982
Buku Teks