APA (7th ed.) Citation

(2001). Headquarters USA: A directory of contact information for headquarters and other central offices of major business & organizations nationwide. Omnigraphics, Inc..

Chicago Style (17th ed.) Citation

Headquarters USA: A Directory of Contact Information for Headquarters and Other Central Offices of Major Business & Organizations Nationwide. Detroit, Mich.: Omnigraphics, Inc., 2001.

MLA (9th ed.) Citation

Headquarters USA: A Directory of Contact Information for Headquarters and Other Central Offices of Major Business & Organizations Nationwide. Omnigraphics, Inc., 2001.