Não informado. (1950). British National Bibliography. British Library, Bibliographic Services Division.
Chicago-Zitierstil (17. Ausg.)Não informado. British National Bibliography. London: British Library, Bibliographic Services Division, 1950.
MLA-Zitierstil (8. Ausg.)Não informado. British National Bibliography. British Library, Bibliographic Services Division, 1950.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.