McMains, J. (2015). "Casino dancing in Cuba and Miami: Spaghetti arms, pretzel turns, and ruedas." Spinning mambo into salsa: Caribbean dance in global commerce. Oxford Scholarship Online.
A Cuban salsa patterns database with great features:find moves by complexity, by number of bars to complete, and by variations of another move. Create a personal account to save your favorites to come back to!
A dictionary of rueda's basic moves plus many patterns at three levels of difficulty. Besides the pattern description, most also have a video.