Online Writing Lab at Purdue University
Purdue University Owl: The Basic Business Letter
This lesson from Purdue's online writing lab details both the parts of a business letter and the various formats for one, including block, modified block, and semi-block. Great resource for getting started writing a professional letter.
Colorado State University
Colorado State Writing Center: Business Letters: Format
This resource gives guidelines to how to construct the proper business letter format. Complete with detailed instructions and examples.
Other
Appalachian State University: Business Letter Format
A site that lists the most important parts of a business letter. Very detailed. Also includes labeled samples of how an appropriate business letter should look.
Other
Writing Scientific Reports
This tutorial site provides links to articles about writing a scientific report or essay as well as to sample essays.
Online Writing Lab at Purdue University
Purdue University Owl: Online Writing Lab
A great resource for middle-school, high-school, and college writers, with worksheets, articles, model papers, and presentations that will help you with research, grammar, style, job-search and professional writing, and more. Includes...