LaTex, BibTex, and EndNote

Online LaTex with Overleaf

OverLeaf
Create LaTeX documents online for free. No software installation necessary.
OverLeaf LaTeX Help
An incredibly helpful collection of LaTeX "How To" pages.
OverLeaf LaTeX Templates
A library of LaTeX document templates.

Bates College Online LaTeX Manual
Practical and concise, this exercise-driven manual has been used by many classes of Bates students as an introduction to LaTeX.
LaTeX Manual Eric Towne

LaTex Beginner's Guide by Stefan Kottwitz
Published: 2011-03-21
Packed with fully explained examples, LaTeX Beginner's Guide is a hands-on introduction quickly leading a novice user to professional-quality results. If you are about to write mathematical or scientific papers, seminar handouts, or even plan to write a thesis, then this book offers you a fast-paced and practical introduction.BibTeX LaTex mathematical equations
Practical LaTeX by George Grätzer
Published: 2014-09-01
Practical LaTeX covers the material that is needed for everyday LaTeX documents. This accessible manual is friendly, easy to read, and is designed to be as portable as LaTeX itself. A short chapter, Mission Impossible, introduces LaTeX documents and presentations. Read these 30 pages; you then should be able to compose your own work in LaTeX.
More Math into LaTeX by George Grätzer
Published: 2016
For over two decades, this comprehensive manual has been the standard introduction and complete reference for writing articles and books containing mathematical formulas. If the reader requires a streamlined approach to learning LaTeX for composing everyday documents, Grätzer's © 2014 Practical LaTeX may also be a good choice.

HandyResources for Two of the Most Comonly Used Styles of LaTeX Citation and Bibliography Management:

BibTeX

BibTeX Bibliography Management
Very helpful guide showing how to cite sources and create a bibliography using LaTeX/BibTeX.
BibTeX Bibliography Styles
List of citation styles available using BibTeX.

Natbib

Natbib Bibliography Management
Very helpful guide showing how to cite sources and create a bibliography using LaTeX/natbib.
Natbib Bibliography Styles
List of citation styles available using natbib.

Export EndNote Library Citation Information in BibTeX Style:

Set your citation output style as "BibTeX" and make sure you can see the preview window for the bibliography citation.
Select the text in the preview window and then copy and paste it to your bibliography .bib file.

Copy the BibTeX formatted citation info from the preview window:

Paste the BibTeX formatted citation info into your .bib file: