rules - In table tennis, can you serve from the side of the table provided the ball is being hit from outside of the playing surface - Sports Stack Exchange
Table Tennis Serving: A Complete Guide | Ping Pong Ruler
5 Basic Service Rules in Table Tennis - PingSunday
How to do a LEGAL table tennis serve (part 1 of 3) - YouTube
SERVICE RULES | Taunton Table Tennis League | TT Leagues