Citazione APA

Beetle, C. (1949). A L A cataloging rules for author and title entries (2nd ed.).

Stile di citazione Chicago

Beetle, Clara. A L A Cataloging Rules for Author and Title Entries. 2nd ed. 1949.

Citazione MLA

Beetle, Clara. A L A Cataloging Rules for Author and Title Entries. 2nd ed. 1949.