Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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