Παραπομπή APA

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

Παραπομπή Chicago Style

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

Παραπομπή MLA

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