Disciplinary Writing Guides (Harvard University) Basic practices and conventions of writing and conducting research in the various academic disciplines.
The Writing Center (UNC at Chapel Hill) Includes handouts for writing in specific disciplines as well as specific writing contexts and more.
Writing in the Disciplines & Across the Curriculum (Montclair State University) Resources on writing in specific disciplines in broad general academic categories: Business & Communication, Humanities, Social Sciences, Sciences, and Mathematics.