No need to give chapter and verse just the main points the interviewer then goes into detail to get the info from you based on your bullet points, when I did mine about 12 years ago there was myself and one other guy left and he did't finish answering the 6 questions as he was writing war and peace for every answer subsequently when the interviewer came back and noticed he was asked to bring his jacket and bag and was never seen again, I then had a chat with the interviewer and he told me they specifically don't want long answers as their job is to drill into your answers and get you to elaborate.