Não informado. (1928). Africa. International Institute of African Languages and Culture.
Chicagoスタイル(17版)引用形式Não informado. Africa. London: International Institute of African Languages and Culture, 1928.
MLA(8版)引用形式Não informado. Africa. International Institute of African Languages and Culture, 1928.
警告: この引用は必ずしも正確ではありません.