APA (7th ed.) Citation

(1992). Guide to libraries and information units: In government departments and other organizations (30th ed.). The British Library Science Reference and Information Service.

Chicago Style (17th ed.) Citation

Guide to Libraries and Information Units: In Government Departments and Other Organizations. 30th ed. London: The British Library Science Reference and Information Service, 1992.

MLA (9th ed.) Citation

Guide to Libraries and Information Units: In Government Departments and Other Organizations. 30th ed. The British Library Science Reference and Information Service, 1992.