  We argue that the gauge invariant source terms in the formalism of the Color
Glass Condensate (CGC) should properly describe the target wave-function if the
microscopic structure is concerned in the regime where the parton distribution
is not quite dense. The quantum property of color charge density is
incorporated in the quantum weight function defined with the source terms. We
sketch that the logarithmic source terms encompass a meaningful picture of the
microscopic structure of the target wave-function.
