Probowati, R., G. A. Fatris, and H. Fitri. “The Correlation Between Family Support to Working Mother With the Development of Pre-School Child As Old As 3-6 Years at Jogoloyo Village, Sumobito Sub District in Jombang District, Indonesia”. International Journal of Sciences: Basic and Applied Research (IJSBAR), vol. 22, no. 1, Apr. 2015, pp. 52-60, https://gssrr.org/index.php/JournalOfBasicAndApplied/article/view/3846.