Alvin M. Castillo, Elmer G. de Jose. “Demographıc Characterıstıcs and Level of Marıtal Satısfactıon of Spouses Undergoıng Nullıfıcatıon Proceedıngs: Basıs for Marıtal Counselıng Program”. International Journal of Advanced Science and Technology, Vol. 29, no. 8s, June 2020, pp. 4528-3, http://sersc.org/journals/index.php/IJAST/article/view/25508.