I'm studying R.E. Gompf and A.I. Stipsticz, 4-Manifolds and Kirby Calculus and I got stuck with a question. Let $K$ be the right-handed trefoil embedded in $\partial \mathbb{D}^4$, we know that, because of the positiveness of $K$, $g_4(K)=1$ i.e. there exists a genus 1 compact surface $\Sigma$ properly embedded in $\mathbb{D}^4$ whose boundary is $K$.
I'm looking for a Kirby diagram for $\mathbb{D}^4$ that shows the properly embedded tubular neighborhood of $\nu\Sigma = \mathbb{D}^2 \times \Sigma$.