Não informado. (1969). Area. Institute of British Geographers.
Chicagoスタイル(17版)引用形式Não informado. Area. London: Institute of British Geographers, 1969.
MLA(8版)引用形式Não informado. Area. Institute of British Geographers, 1969.
警告: この引用は必ずしも正確ではありません.
Não informado. (1969). Area. Institute of British Geographers.
Chicagoスタイル(17版)引用形式Não informado. Area. London: Institute of British Geographers, 1969.
MLA(8版)引用形式Não informado. Area. Institute of British Geographers, 1969.