(1972). Subject retrieval in the seventies: New directions. Greenwood Publishing Company.
Chicago Style aipamenaSubject Retrieval in the Seventies: New Directions. Westport, Connecticut: Greenwood Publishing Company, 1972.
MLA aipamenaSubject Retrieval in the Seventies: New Directions. Greenwood Publishing Company, 1972.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.