Webbo, R. K., M. Kihara, and M. Karume. “Effect of Age and Marriage Duration on Marital Satisfaction: A Case of Christian Marriages in Kenya”. The International Journal of Humanities & Social Studies, vol. 5, no. 8, Aug. 2017, https://internationaljournalcorner.com/index.php/theijhss/article/view/125759.