Osaka : Graduate School of Human Sciences Osaka University
Majalah, Jurnal, Buletin
The School of Oriental and African Studies : University of London
Majalah, Jurnal, Buletin
Univ. of Tennessee
The health and safety dept., 1973
Buku Teks
edited by Catherine Murphy
Libraries Unlimited , 1992
Buku Teks SO
Gardiner, Jewel
American Library Association, 1954
Buku Teks SO