as in to writers and sources yeh?
(insert name here) stated/states/as stated by, ect. dont use book names always use author name.
then always say how it proves your point, eg. (insert name here) stated (insert qoute here), clearly this is shows (insert piont here) and links back to the idea of (insert idea here)
hope this helps, what topic are you doing (i mite be able to help as im doing Anc Hist and its my HSC yr)