Math Easy Solutions, that paragraph is close but not quite: a hologram records the interference pattern between coherent light from an object beam and a reference beam, usually derived from the same laser, not just “2 or more laser light sources” in general (UCSD notes, IntechOpen). A cleaner version is: “A hologram records the interference pattern between reference light and light scattered from an object. When the developed hologram is illuminated with the proper reconstruction beam, it diffracts light to recreate the object wavefront, producing a 3D image” (Wikipedia overview, holography.ru). The white-light part is only true for specific hologram types, especially reflection/volume holograms where the recorded fringes act more like Bragg-selective layers; putting the film between beams does not automatically mean “standing waves” or guaranteed white-light reconstruction (UCSD notes, IntechOpen).