United States. Library of Congress. Library of Congress subject heading. [s.n.].
Citazione stile Chigago Style (17a edizione)United States. Library of Congress. Library of Congress Subject Heading. [s.l: [s.n.].
Citatione MLA (9a ed.)United States. Library of Congress. Library of Congress Subject Heading. [s.n.].
Attenzione: Queste citazioni potrebbero non essere precise al 100%.