Lua APA (7ú heag.)

Avram, H. D. (1975). MARC, its history and implications. Library of Congress.

Lua i Stíl Chicago (17ú heag.)

Avram, Henriette D. MARC, Its History and Implications. Washington: Library of Congress, 1975.

Lua MLA (9ú heag.)

Avram, Henriette D. MARC, Its History and Implications. Library of Congress, 1975.

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