Makmur, Erwin, et al. “Development Model Using Multi Predictors for Predicting the Onset of Rainy Season (Case Study in Northern Coastal West Java Province Indonesia)”. International Journal of Sciences: Basic and Applied Research (IJSBAR), vol. 24, no. 2, Sept. 2015, pp. 417-33, https://www.gssrr.org/JournalOfBasicAndApplied/article/view/4635.