Queen, Ellery, author
New English Library Limited, 1967
Buku Teks
Routledge, Taylor & Francis Group, 2007
Buku Referensi
Hazel, John, author
Routledge, 2000
Buku Teks
Hazel, John, author
Routledge, 2000
Buku Referensi
Europe Publications Limited, 1984
Buku Referensi