Wehefritz, V. (1980). International loan services and union catalogues: Fédération Internat. des Associations de Bibliothécaires. Ed. by Valentin Wehefritz (2., completely rev. ed., Sonderdr.). Klostermann.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWehefritz, Valentin. International Loan Services and Union Catalogues: Fédération Internat. Des Associations De Bibliothécaires. Ed. by Valentin Wehefritz. 2., completely rev. ed., Sonderdr. Frankfurt am Main: Klostermann, 1980.
एमएलए (8वां संस्करण) प्रशस्ति पत्रWehefritz, Valentin. International Loan Services and Union Catalogues: Fédération Internat. Des Associations De Bibliothécaires. Ed. by Valentin Wehefritz. 2., completely rev. ed., Sonderdr. Klostermann, 1980.
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