Basic Structure - Overleaf, Editor de LaTeX online
Editing documents with LaTeX
Page layout - Thesis in LaTeX
Ankur's blog: More LaTeX document classes: resume and cover-letter
Using the WITPress LATEX Document Class
paper size - b5paper option for book document class abnormal results - TeX - LaTeX Stack Exchange
LaTeX documentclass options illustrated – texblog
A Guide to LaTeX Document Classes | ProofreadMyEssay
Page layout - Thesis in LaTeX
GitHub - NicklasVraa/LiX: Compose papers, dissertations, textbooks, novels, newspapers etc. quicker using abstractions to the standard LaTeX document classes - or create your own classes easily.
document classes - What are the available "documentclass" types and their uses? - TeX - LaTeX Stack Exchange
Your Guide to documentclass LaTeX: Types and options - LaTeX-Tutorial.com