File: sass_reference — sass documentation, Sass is an extension of css that adds power and elegance to the basic language. it allows you to use variables, nested rules, mixins, inline imports, and more, all. W3schools online web tutorials, <!doctype html> <html> <title>html tutorial</title> <body> <h1>this is a heading</h1> <p>this is a paragraph.</p> </body> </html>. Ieee citation reference, Ieee citation reference ieee publications uses webster’s college dictionary, 4th edition. for guidance on grammar and usage not included in this manual, please.