Dyfyniad APA

Simpson I S. (1972). Classified Library of Congress Subject Headings. Marcel Dekker.

Dyfyniad Arddull Chicago

Simpson I S. Classified Library of Congress Subject Headings. London: Marcel Dekker, 1972.

Dyfyniad MLA

Simpson I S. Classified Library of Congress Subject Headings. Marcel Dekker, 1972.

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