1. Adams, S. O., and Bamanga, M. A., Am. J. Math. 10,1, 10–19 (2020).
2. Ali, S. M., Iraqi J. Sci. 54, 4, 1136–1142 (2013).
3. BMKG., Tanya Jawab: La Niña, El Niño dan Musim di Indonesia, (In Badan Meteorologi Klimatologi dan Geofisika (BMKG), 2020).
4. Box, G. E., and Cox, D. R., J. R. Stat. Soc. 26, 2, 211–252 (1964).
5. Box, G. E. P., Jenkins, G. M., Reinsel, G. C., and Ljung, G. M., Time Series Analysis Forecasting and Control, (Publisher John Wiley and Sons, Inc Fifth Edit, Vol. 9, Issue 1, 2016).