Question About Referencing

I'm at Oxford Brookes and there's an unseen exam coming up. When I'm referencing in exam's to particular studies or researchers, do I just need to know his or hers name?. I.E: Do I not need to remember years, or the page on which the research was sourced? Also, I'm guessing I don't need to write a full bibliography, or remember the publisher, city, editor of every book I've used.

So for example would this be acceptable referencing in an unseen exam?:

Hall stated that city centres have been more densely populated with the move to post-industrialism. This means that as globalisation has accelerated, city centres have too become more densely populated, especially with the increased movement of ethnic minorities in and out of major world cities.

Finally, in unseen exam's do you need to use speech marks to indicate where quotes or text have been directly lifted from reading material? Or is simply stating a researchers name enough to demonstrate your understanding?

Overall, I did Sociology at A Level, so are university unseen exams similar to those?

Thanks in advance!