Wehefritz, V. (1974). International loan services and union catalogues: Publ. by the Committee on Union Catalogues and Internat. Loans of the Internat. Federation of Library Associations under the editorship of Valentin Wehefritz ([1st ed.].). Klostermann.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWehefritz, Valentin. International Loan Services and Union Catalogues: Publ. by the Committee on Union Catalogues and Internat. Loans of the Internat. Federation of Library Associations Under the Editorship of Valentin Wehefritz. [1st ed.]. Frankfurt am Main: Klostermann, 1974.
एमएलए (8वां संस्करण) प्रशस्ति पत्रWehefritz, Valentin. International Loan Services and Union Catalogues: Publ. by the Committee on Union Catalogues and Internat. Loans of the Internat. Federation of Library Associations Under the Editorship of Valentin Wehefritz. [1st ed.]. Klostermann, 1974.