Cita APA (7th ed.)

Gale Research Company & Dresser, P. D. (1989). New research centers: The supplement to the 13th edition of research centers directory. Gale Research Company.

Cita Chicago (17th ed.)

Gale Research Company i Peter D. Dresser. New Research Centers: The Supplement to the 13th Edition of Research Centers Directory. Detroit: Gale Research Company, 1989.

Cita MLA (9th ed.)

Gale Research Company i Peter D. Dresser. New Research Centers: The Supplement to the 13th Edition of Research Centers Directory. Gale Research Company, 1989.