Não informado. (1950). British National Bibliography. British Library, Bibliographic Services Division.
Citace podle Chicago (17th ed.)Não informado. British National Bibliography. London: British Library, Bibliographic Services Division, 1950.
Citace podle MLA (8th ed.)Não informado. British National Bibliography. British Library, Bibliographic Services Division, 1950.
Upozornění: Tyto citace jsou generovány automaticky. Nemusí být zcela správně podle citačních pravidel..