I made this while studying arm anatomy, since modeling every part is the only way I can get it in my dumb head :D Tried to simplify shapes but turned out to be somewhere inbetween.
"Struttura Uomo Vol.1" by Lolli, Zochetta, Peretti 
"The Artist's Guide to Human Anatomy" by Gottfried Bammes
"Anatomy for Sculptors" by Zarins, Kondrats
3D Anatomy for Artists by Catfish studios.
Proko's Youtube Videos
If you see a mistake, please let me know.