  In this article, we reproduce results of classical regularity theory of
quasilinear elliptic equations in the divergence form, in the setting of
Heisenberg Group. The considered cases encompass a very wide class of equations
with isotropic growth conditions that are generalizations of the $p$-Laplacian
type equation and also include equations with polynomial or exponential type
growth. Some more general conditions have also been explored.
