APA (7th ed.) Citation

British Museum. (1948). Rules for Compiling the Catalogues of Printed Books, Maps and Music in the British Museum.

Chicago Style (17th ed.) Citation

British Museum. Rules for Compiling the Catalogues of Printed Books, Maps and Music in the British Museum. London, 1948.

MLA (8th ed.) Citation

British Museum. Rules for Compiling the Catalogues of Printed Books, Maps and Music in the British Museum. 1948.