Lowenstein, Katharin Wendy, author
Hyland House Publishing , 1977
Buku Teks
Gilbert, P.F.
The Jacaranda Press, 1978
Buku Teks
Sherington, Geoffrey, author
Allen and Unwin, 1990
Buku Teks
Sherington, Geoffrey, author
George Allen and Unwin, 1982
Buku Teks
Kennedy, John F
Evanston, 1964
Buku Teks