Maria และผู้แต่งคนอื่นๆ. 1998. Age at first marriage in the Philippines : evidence from the 1993 National Demographic Survey. Faculty of Graduate Studies, Mahidol University;
Maria และผู้แต่งคนอื่นๆ. (1998) Age at first marriage in the Philippines : evidence from the 1993 National Demographic Survey . Mahidol University/Bangkok.
Maria และผู้แต่งคนอื่นๆ. Age at first marriage in the Philippines : evidence from the 1993 National Demographic Survey. . Bangkok:Mahidol University, 1998.
Maria และผู้แต่งคนอื่นๆ. (1998) Age at first marriage in the Philippines : evidence from the 1993 National Demographic Survey . Mahidol University/Bangkok.