Google Scholar provides a simple way to broadly search for scholarly literature. From one place, you can search across many disciplines and sources: articles, theses, books, abstracts and court opinions, from academic publishers, professional societies, online repositories, universities and other web sites. Google Scholar helps you find relevant work across the world of scholarly research.
5. University of Oxford (Library)
Oxford meets the needs of its students, academics and the international research community with a wide range of library services provided by more than 100 libraries, making it the largest library system in the UK.
6. Perpusnas
It is website library of indonesian goverment that using standart writing of indonesian. Actually it was include of many book, journal, or article that published by writer and researcher.
7. Journal of education islamic research.
Journal of Islamic Education Research is a peer-reviewed journal on Islamic education published by Program Studi Pendidikan Agama Islam Fakultas Tarbiyah dan Ilmu Keguruan IAIN Jember.
Hopefully, some of the above information can help the rest of the reader find some of the credible and logic sources on the research. As for the merits and disadvantages on each website, for that matter be a creative, active and critical reader.
