APA (7th ed.) Citation

Dyer, H., & Gunson, A. (1990). a directory of library and information retrieval software for microcomputers. Gower.

Chicago Style (17th ed.) Citation

Dyer, Hilary, and Alison Gunson. A Directory of Library and Information Retrieval Software for Microcomputers. Hants: Gower, 1990.

MLA (9th ed.) Citation

Dyer, Hilary, and Alison Gunson. A Directory of Library and Information Retrieval Software for Microcomputers. Gower, 1990.

Warning: These citations may not always be 100% accurate.