Não informado. (1950). British National Bibliography. British Library, Bibliographic Services Division.
Chicagoスタイル(17版)引用形式Não informado. British National Bibliography. London: British Library, Bibliographic Services Division, 1950.
MLA(8版)引用形式Não informado. British National Bibliography. British Library, Bibliographic Services Division, 1950.
警告: この引用は必ずしも正確ではありません.