Não informado. (1950). British National Bibliography. British Library, Bibliographic Services Division.
Style de citation Chicago (17e éd.)Não informado. British National Bibliography. London: British Library, Bibliographic Services Division, 1950.
Style de citation MLA (8e éd.)Não informado. British National Bibliography. British Library, Bibliographic Services Division, 1950.
Attention : ces citations peuvent ne pas être correctes à 100%.