Dewey Melvil. (1971). Decimal Classification and Relative Index vol. ii schedules (18th.). Forest press Inc.
Lua i Stíl Chicago (17ú heag.)Dewey Melvil. Decimal Classification and Relative Index Vol. Ii Schedules. 18th. New York: Forest press Inc, 1971.
Lua MLA (9ú heag.)Dewey Melvil. Decimal Classification and Relative Index Vol. Ii Schedules. 18th. Forest press Inc, 1971.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.