(1) no objection letter from your company, stating ur salary / position and that they dont hav any objection if u bring your m-i-l and s-i-l; (2) typed application forms; (3) their passport copies; (4) your i/d copy; (5) your wife's passport copy and (6) your marriage certificate. With all these documents, go directly to the first floor of main immigration bldg in garaffa, take the approval from the manager there, and submit the papers with the official, @ office no. 4. After a day or two, u will get the visas.