You need to make clear the distinction between direct quotation and paraphrasing.
Direct quotation needs a citation, or a source where the passage originates. You need to record full citations for each book, article, archival material, etc. used in your writing. The RefWorks is a good place to keep the citations in an organized manner.
To find books on your topics of interest in the Library Catalog, start by doing a KEYWORD SEARCH to locate appropriate SUBJECT HEADINGS.
Keyword search: (humanitarian crisis)
Subject Headings: genocide, refugees, (human rights)
Keyword search: (computer architecture)
Subject Heading: (software engineering), (computer science), (computer architecture)
Keyword search: identity and (mental health)
Subject Headings: (emigration and immigration) and (mental health)