Best Practices for Designing UI Buttons Lesson
Best Practices for Designing Buttons, by Nanzing Johnmark
design patterns - UX guidelines for placing edit buttons? - User Experience Stack Exchange
Designing for Action: Best Practices for Effective Buttons, Wireframing Academy
Primary & Secondary Action Buttons, by Nick Babich
Button UX Design: Best Practices, Types and States
UX guidelines for placing the edit button, by Norah S
Buttons on the web: placement and order, by Artem Syzonenko
Button UX Design: Best Practices, Types and States, by Nick Babich
Button Design: Best Practices for Optimal UI Buttons – Baymard Institute