APA استشهاد

Cassell K A & Hiremath U. (2006). Reference and information services in the 21st century: An introduction. Facet Publisher.

استشهاد بنمط شيكاغو

Cassell K A و Hiremath U. Reference and Information Services in the 21st Century: An Introduction. London: Facet Publisher, 2006.

MLA استشهاد

Cassell K A و Hiremath U. Reference and Information Services in the 21st Century: An Introduction. Facet Publisher, 2006.