APA

Haykin D. J., Library of Congress & Library of Congress. (1951). Subject headings: a practical guide. Washington, D.C: U.S. G.P.O.

Chicago

Haykin David Judson, Library of Congress and Library of Congress. 1951. Subject headings: a practical guide. Washington, D.C: U.S. G.P.O.

Harvard

Haykin D. J., Library of Congress and Library of Congress. (1951). Subject headings: a practical guide. Washington, D.C: U.S. G.P.O.

MLA

Haykin David Judson, Library of Congress and Library of Congress. Subject headings: a practical guide. Washington, D.C: U.S. G.P.O. 1951.