.Westby, B. M. (1977). Sears list of subject headings (11th ed.). The H. W. Wilson Company.
Chicago Style (17. basım) Atıf.Westby, Barbara M. Sears List of Subject Headings. 11th ed. New York: The H. W. Wilson Company, 1977.
MLA (9th ed.) Atıf.Westby, Barbara M. Sears List of Subject Headings. 11th ed. The H. W. Wilson Company, 1977.
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