APA (7th ed.) Citation

Helicon. (2006). Hutchinson Directory of Web Sites. Helicon Publishing.

Chicago Style (17th ed.) Citation

Helicon. Hutchinson Directory of Web Sites. Abingdon: Helicon Publishing, 2006.

MLA (9th ed.) Citation

Helicon. Hutchinson Directory of Web Sites. Helicon Publishing, 2006.

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