APA (7th ed.) Citation

Downs, R. B., & Downs, E. C. (1974). British library resources: A bibliographical guide. American Library Association.

Chicago Style (17th ed.) Citation

Downs, Robert Bingham, and Elizabeth C. Downs. British Library Resources: A Bibliographical Guide. Chicago: American Library Association, 1974.

MLA (9th ed.) Citation

Downs, Robert Bingham, and Elizabeth C. Downs. British Library Resources: A Bibliographical Guide. American Library Association, 1974.