Não informado. (1971). International African Bibliography. International African Institute.
Chicagoスタイル(17版)引用形式Não informado. International African Bibliography. London: International African Institute, 1971.
MLA(8版)引用形式Não informado. International African Bibliography. International African Institute, 1971.
警告: この引用は必ずしも正確ではありません.