ケネス・マクダフ
ISBN 978-1-84358-617-3. https://books.google.com/books?id=mUg4AAAAQBAJ Christopher Berry-Dee (23 May 2003). Talking with Serial Killers: The Most Evil People in the World Tell Their Own Stories. John Blake Publishing. ISBN 978-1-84358-617-3. https://books.google.com/books?id=mUg4AAAAQBAJ Christopher Berry-Dee (23 May 2003). Talking with Serial Killers: The Most Evil People in the World Tell Their Own Stories. John Blake Publishing. ISBN 978-1-84358-617-3. https://books.google.com/books?id=mUg4AAAAQBAJ