Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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