Reference this Research Paper (copy & paste below code):
Dr. Annie Uwimana, Dr. BI Xiuchun, Professor ZHANG Shuguang (2018); Modeling and Forecasting Africas GDP with Time Series Models;
Int J Sci Res Publ 8(4) (ISSN: 2250-3153). http://www.ijsrp.org/research-paper-0418.php?rp=P767304