Simon, Maron J
Charks Scribner's, 1971
Buku Teks
White, Patrick, 1912-1990
Jonathan Cape, 1981
Buku Teks SO
Whitlam, Nicholas
University of Queensland Press, 1985
Buku Teks SO
Canberra, Australia : Department of Foreign Affairs
Majalah, Jurnal, Buletin
Singh, Kirpal
University Education Press , 1986
Buku Teks SO