Collison, R. L. (1968). Bibliographies, subject and national: A guide to their contents, arrangement and use (3rd ed.). C. Lockwood.
Lua i Stíl Chicago (17ú heag.)Collison, Robert Lewis. Bibliographies, Subject and National: A Guide to Their Contents, Arrangement and Use. 3rd ed. London: C. Lockwood, 1968.
Lua MLA (8ú heag.)Collison, Robert Lewis. Bibliographies, Subject and National: A Guide to Their Contents, Arrangement and Use. 3rd ed. C. Lockwood, 1968.
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