sec 10 06 to 07 Master--Slave and Edge-Triggered J-K Flip-Flop - YouTube
JK Flip Flop: What is it? (Truth Table & Timing Diagram) | Electrical4U
JK Flip-Flop Explained | Race Around Condition in JK Flip-Flop | JK Flip- Flop Truth Table, Excitation table and Timing Diagram - ALL ABOUT ELECTRONICS