John Macbeath, Neil Dempster
Routledge, 2009
Buku Teks
Leese, Joseph
Harper & Row, 1961
Buku Teks
Taba, Hilda
Harcourt Brece & World, 1962
Buku Teks
Nicholls, Audrey
George Allen and Unwin, 1972
Buku Teks
Lucas, A.M.
Australia International Press , 1979
Buku Teks