APA (7th ed.) Citation

Washington Researchers. (1990). How to find information about private companies (3rd ed.). Washington Researchers.

Chicago Style (17th ed.) Citation

Washington Researchers. How to Find Information About Private Companies. 3rd ed. Washington, DC: Washington Researchers, 1990.

MLA (9th ed.) Citation

Washington Researchers. How to Find Information About Private Companies. 3rd ed. Washington Researchers, 1990.

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