Gumaco Industries32 Calbayog St, Mandaluyong, 1550 Kalakhang Maynila, Pilipinas
National Book Store - SM MegamallGround Floor, SM Megamall Building A, , EDSA cor. Doña Julia Vargas Ave., Ortigas Center, Brgy. Wack-Wack Greenhills, Mandaluyong, Metro Manila, Pilipinas