APA-ийн эшлэл(7 дахь хэвлэлт)

Cassell, K. A., & Hiremath, U. (2011). Reference and information services in the 21st century: An introduction (2nd ed. rev.). Neal-Schuman Publishers.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

Cassell, Kay Ann, ба Uma Hiremath. Reference and Information Services in the 21st Century: An Introduction. 2nd ed. rev. New York: Neal-Schuman Publishers, 2011.

MLA -ийн эшлэл (9 дэх хэвлэлт)

Cassell, Kay Ann, ба Uma Hiremath. Reference and Information Services in the 21st Century: An Introduction. 2nd ed. rev. Neal-Schuman Publishers, 2011.