Html

I did leave out one of the most priceless references I know of witch is w3schools
From Wikipedia, the free encyclopedia

W3Schools is a web developer's portal, with tutorials and references relating to web development subjects, including HTML, XML, CSS, and JavaScript. W3Schools is free of charge, and is funded through text and display advertising.[1]. The tutorials and references on the website and the related code are proprietary.[2].
It is created and owned by Refsnes Data, a Norwegian family-owned software development and consulting company.[3]

learning some basic html is extremely valuable and I highly recomend learning all the diffrent methods for creating links