APA (7th ed.) Citation

British Museum. Department of Printed Books. (1971). General catalogue of printed books: Five year supplement, 1966-1970. Trustees of the British Museum.

Chicago Style (17th ed.) Citation

British Museum. Department of Printed Books. General Catalogue of Printed Books: Five Year Supplement, 1966-1970. London: Trustees of the British Museum, 1971.

MLA (9th ed.) Citation

British Museum. Department of Printed Books. General Catalogue of Printed Books: Five Year Supplement, 1966-1970. Trustees of the British Museum, 1971.