APA (7th ed.) Citation

Downs, R. B. (1938). Resources of Southern libraries: A survey of facilities for research. American Library Association.

Chicago Style (17th ed.) Citation

Downs, Robert B. Resources of Southern Libraries: A Survey of Facilities for Research. Chicago: American Library Association, 1938.

MLA (9th ed.) Citation

Downs, Robert B. Resources of Southern Libraries: A Survey of Facilities for Research. American Library Association, 1938.