MacKendrick, Paul, 1914-
St Martin's Press, 1962
Buku Teks SO
Camp, L. Sprague de
Holt, Rinehart & Winston, 1952
Buku Teks
Senior, Michael
Longman, 1979
Buku Teks SO
King, Stephen
A signet book , 1991
Buku Teks SO
Kassirsky, I.
Peace Publisher, [Date of publication not identified]
Buku Referensi