Great Britain at the University Press, Cambridge, 1992
Majalah, Jurnal, Buletin
editors, Andy Kirkpatrick, Roland Sussex
Springer, 2012
eBooks
Sambrook, G.A., author
Longmans, Green, 1947
Buku Teks SO
William Allan Neilson, editor in chief; Thomas A. Knott, general editor; Paul W. Carhart, managing editor
Springfield, G & C Merriam Co.
Buku Referensi
London Collier-Macmillan 1965,
Buku Teks