(1982). IITA research highlights 1981. Nigeria: The Institute.
Trích dẫn kiểu ChicagoIITA Research Highlights 1981. Nigeria: The Institute, 1982.
MLA引文IITA Research Highlights 1981. Nigeria: The Institute, 1982.
警告：这些引文格式不一定是100％准确.
APA引文