Generally, I don't need any help in the form of sources. I provide an appropriate reference list and corresponding citations in the paper. Most of the time, the same information could also be found in the texts actually used in your courses, so you should be able to find all the same stuff in there, such as in whatever Psychology or Nursing textbook you use. There are certain types of papers that I may not be able to do without your reference material but I tell clients that at the time that I give them a price for the work. Sometimes, looking over the material you send becomes part of figuring out whether I can write it and how much to charge. If the resources you provide make my job easier, I take that into account in pricing; same goes for when the sources you require me to use actually make the job harder than using my own.
Keep in mind that sending us too much material makes it harder for us instead of easier. When you send us 10 files that you downloaded just because they sounded like they might be useful, we have to go through them to find what's useful and sometimes, none of it really is. Therefore, as a general rule, I don't need help with the research unless I ask for it but if you happen to have one or two really good resources on your topic, there's no harm in sending them. Just keep in mind that quality is more important than quantity and sometimes less is more.
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