Cita APA

Urquhart J A. (1977). Sears list of subject headings. The H W Wilson Comp.

Citación estilo Chicago

Urquhart J A. Sears List of Subject Headings. London: The H W Wilson Comp, 1977.

Cita MLA

Urquhart J A. Sears List of Subject Headings. The H W Wilson Comp, 1977.