2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/91869Considering some important classes of generalized coherent states known in literature, we demonstrated that all of them can be created via conventional fashion, i.e. the "lowering operator eigen-state" and the "displacement operator" techniques using the {\it "nonlinear coherent states"} approach. As a result we obtained a {\it "unified method"} to construct a large class of coherent states which already have been introduced by different prescriptions.17pages, The section 7 in last version is revised, Some references are addedQuantum Physicstext