APA (7th ed.) Citation

Westlake, D. R., Hunter, A. M., & Sheridan, M. (1992). GEAC: A guide for librarians and systems managers (2nd ed. amp.). Gower.

Chicago Style (17th ed.) Citation

Westlake, Duncan R., Alison M. Hunter, and Margaret Sheridan. GEAC: A Guide for Librarians and Systems Managers. 2nd ed. amp. Aldershot: Gower, 1992.

MLA (9th ed.) Citation

Westlake, Duncan R., et al. GEAC: A Guide for Librarians and Systems Managers. 2nd ed. amp. Gower, 1992.