[1] W3Schools (201X) HTML5 Tutorial, retrieved December 28, 2016 from http://www.w3schools.com/html/
HTML Basic
HTML Elements
HTML Attributes
HTML Headings
HTML Paragraphs
HTML Comments
HTML CSS
HTML Links
HTML Media
HTML Video
HTML Images
HTML Blocks
HTML Classes
HTML JavaScript
HTML File Paths
HTML Head
HTML URL Encode
HTML Styles
HTML Formatting
HTML5 Style Guide
HTML YouTube
[2] W3Schools (201X) CSS Tutorial, retrieved December 28, 2016 from http://www.w3schools.com/css/
CSS Introduction
CSS Syntax
CSS How To
CSS Colors
CSS Backgrounds
CSS Height/Width
CSS Box Model
CSS Text
CSS Fonts
CSS Icons
CSS Links
CSS Display
CSS Position
CSS Overflow
CSS Float
CSS Inline-block
CSS Align
CSS Combinators
CSS Pseudo-class
CSS Pseudo-element
CSS Opacity
CSS Selectors
CSS Colors
[3] W3Schools (201X) Javascript Tutorial, retrieved December 28, 2016 from http://www.w3schools.com/js/
JS Introduction
JS Output
JS Syntax
JS Statements
JS Comments
JS Variables
JS Operators
JS Arithmetic
JS Assignment
JS Data Types
JS Functions
JS Scope
JS Events
JS Strings
JS Numbers
JS Math
JS Arrays
JS Comparisons
JS Conditions
JS Loop For
JS Loop While
JS Hoisting
JS Style Guide
JS Best Practices