APA

Library of Congress, . (1978). Volunteers who produce books. Washington: National Library Service for the Blind and Physically Handicapped.

Chicago

Library of Congress, . 1978. Volunteers who produce books. Washington: National Library Service for the Blind and Physically Handicapped.

Harvard

Library of Congress, . (1978). Volunteers who produce books. Washington: National Library Service for the Blind and Physically Handicapped.

MLA

Library of Congress, . Volunteers who produce books. Washington: National Library Service for the Blind and Physically Handicapped. 1978.