APA (7th ed.) Citation

Gale Group, Gale Research Company, & Thomson Gale (Firm). (1987). Government research directory (4th ed.). Gale Research Co.

Chicago Style (17th ed.) Citation

Gale Group, Gale Research Company, and Thomson Gale (Firm). Government Research Directory. 4th ed. Detroit, Mich: Gale Research Co, 1987.

MLA (9th ed.) Citation

Gale Group, et al. Government Research Directory. 4th ed. Gale Research Co, 1987.