Παραπομπή APA

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

Παραπομπή Chicago Style

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

Παραπομπή MLA

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