The MSU Writing Center
The Writing Center (opens in new tab) in Michigan State University offers consultations at locations on the MSU campus, as well as online.
They have quick guides on their services here http://writing.msu.edu/resources/quick-guides/ (opens in new tab).
In the social sciences, writers usually use active rather than passive voice. If you majored in a health or natural science for your undergraduate degree, you might have been told to use the passive voice in your scholarly writing, so you'll have to switch when you write papers in public health.
Passive Voice: A mistake was made by the Finance Department.
Active Voice: The Finance Department made a mistake.
You can find further explanations of active/passive voice on these websites:
Below are some resources to help you avoid plagiarism in your writing:
Examples of paraphrasing (MIT)
Plagiarism (UNC-Chapel Hill)
How to paraphrase a source (University of Wisconsin)
UNC at Chapel Hill has a wide variety of short and concise guides to a range of topics. https://writingcenter.unc.edu/handouts/
Here is a selection that are specifically useful to the types of writing you may be asked to do in the MPH program.