ZoteroZotero is a free, open source reference management software, for managing bibliographic data and related research materials (e.g., PDFs). Notable features include web browser integration, online syncing, generation of in-text citations, footnotes and bibliographies, as well as integration with the word processors.
Zotero Standalone allows Zotero to be run as an independent program outside Firefox. You can add PDFs, images, audio and video files, snapshots of web pages, and really anything else. Zotero automatically indexes the full-text content of your library. On many websites such as library catalogs, PubMed, Google Scholar, Google Books, Amazon.com, Wikipedia, and publisher's websites, Zotero shows an icon when a book, article, or other resource is being viewed. By clicking this icon, the full reference information can be saved to the Zotero library.
Zotero can also save a copy of the webpage, or, in the case of scientific articles, a copy of the full text PDF.
Qualitative Research Methods in Special Education by
Describes the history, theory, and methodology of each of eight different qualitative research methods. Demonstrates how qualitative research is particularly suited to investigating the experiences of students, teachers, school leaders, and families, as well as the meanings or attributions associated with those experiences.
Successful Research Projects: a step-by-step guide by 
How to Design and Evaluate Research in Education by 
Research and Documentation in the Digital Age by 