Archer, Geoffrey
Arrow, 2002
Buku Teks SO
Bailey, Cyril
Oxford University Press, 1951
Buku Teks SO
edited by Val Moses
Grayson Publishing, 2007
Buku Teks SO
Zainah Anwar
Yayasan Mohamed Noah; Petaling Jaya, Selangor, Malaysia , 2011
Buku Referensi
Klaveness, Jan O`Donnell
Macmillan, 1983
Buku Teks SO