Albion won their second away game inside four days after battling back from a goal down to beat Reading 2-1.
Kyle Bartley made amends after he conceeded a needless penalty for handball with a fine looping header just after the break.
After the hosts had taken the lead from the spot in the 11th minute, Matheus Pereira equalised with a rebound after his initial effort had been saved at close range.
Albion's victory, only days after a spirited win at Milwall, saw the Bagggies go six points clear at the top of the Championship.
"It was a good performance from us," Bilic claimed.
"This is a difficult league and you have to be strong technically and tactically and you have to manage your way through games.
"We went behind in an unfortunate way, but we didn't panic and we kept calm and composed and equalised soon after.
"We never lost belief in our quality. When we do that, we will always have the chance to win games.
"There's a long way to go, so the points gap is nothing to talk about right now. It's all about the games to go. Six points would only mean something to me if we had just two games left.
"Kyle (Bartley) can't quite explain what happened and what he was thinking, but it's great for him to score and play his part in that victory."