Pages can easily refer to other pages within the system. When a page is mentioned by name in the contents of another page, the system automatically creates a hyperlink to it. This is called an internal reference.
Other web pages can be referred to in two different ways. When a URL is found within the contents of a page, the system creates an external reference. However, a tidier and more formal way of referring to external pages is though citations. A citation is a word enclosed in square brackets which can be associated with a URL. If any images (GIF or JPEG) are referred to by either method, they are automatically inlined.